kernel: replace SUBDIRS with M in package recipes

The SUBDIRS variable has been removed in kernel 5.4, and was deprecated
since the beginnig of kernel git history in favour of M or KBUILD_EXTMOD.

Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>

package/kernel/acx-mac80211/Makefile

@@ -181,7 +181,7 @@ PKG_EXTRA_CFLAGS:= \
 define Build/Compile
 	$(MAKE) -C "$(LINUX_DIR)" \
 		$(KERNEL_MAKE_FLAGS) \
-		SUBDIRS="$(PKG_BUILD_DIR)" \
+		M="$(PKG_BUILD_DIR)" \
 		$(PKG_EXTRA_KCONFIG) \
 		EXTRA_CFLAGS="$(PKG_EXTRA_CFLAGS) -DCONFIG_ACX_MAC80211_VERSION=\"KERNEL_VERSION(4,2,0)\"" \
 		LINUXINCLUDE="-I$(STAGING_DIR)/usr/include/mac80211-backport/uapi -I$(STAGING_DIR)/usr/include/mac80211-backport \

package/kernel/ath10k-ct/Makefile

@@ -112,7 +112,7 @@ endif
 define Build/Compile
 	+$(MAKE) $(CT_MAKEDEFS) $(PKG_JOBS) -C "$(LINUX_DIR)" \
 		$(KERNEL_MAKE_FLAGS) \
-		SUBDIRS="$(PKG_BUILD_DIR)/ath10k$(CT_KVER)" \
+		M="$(PKG_BUILD_DIR)/ath10k$(CT_KVER)" \
 		NOSTDINC_FLAGS="$(NOSTDINC_FLAGS)" \
 		modules
 endef

package/kernel/broadcom-wl/Makefile

@@ -102,7 +102,7 @@ endef
 MAKE_KMOD := $(MAKE) -C "$(LINUX_DIR)" \
 		$(KERNEL_MAKE_FLAGS) \
 		PATH="$(TARGET_PATH)" \
-		SUBDIRS="$(PKG_BUILD_DIR)/kmod" \
+		M="$(PKG_BUILD_DIR)/kmod" \
 
 define Build/Prepare
 	$(call Build/Prepare/Default)
@@ -113,18 +113,18 @@ endef
 define Build/Compile
 	# Compile glue driver
 	$(MAKE_KMOD) -C "$(LINUX_DIR)" \
-		SUBDIRS="$(PKG_BUILD_DIR)/glue" \
+		M="$(PKG_BUILD_DIR)/glue" \
 		modules
 
 	# Compile the kernel part
 	$(MAKE_KMOD) \
-		SUBDIRS="$(PKG_BUILD_DIR)/driver" \
+		M="$(PKG_BUILD_DIR)/driver" \
 		MODFLAGS="-DMODULE -mlong-calls" \
 		KBUILD_EXTRA_SYMBOLS="$(PKG_BUILD_DIR)/glue/Module.symvers" \
 		modules
 
 	$(MAKE_KMOD) \
-		SUBDIRS="$(PKG_BUILD_DIR)/driver-mini" \
+		M="$(PKG_BUILD_DIR)/driver-mini" \
 		MODFLAGS="-DMODULE -mlong-calls" \
 		BUILD_TYPE="wl_apsta_mini" \
 		KBUILD_EXTRA_SYMBOLS="$(PKG_BUILD_DIR)/glue/Module.symvers" \

package/kernel/button-hotplug/Makefile

@@ -37,7 +37,7 @@ EXTRA_CFLAGS:= \
 
 MAKE_OPTS:= \
 	$(KERNEL_MAKE_FLAGS) \
-	SUBDIRS="$(PKG_BUILD_DIR)" \
+	M="$(PKG_BUILD_DIR)" \
 	EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
 	$(EXTRA_KCONFIG)
 

package/kernel/gpio-button-hotplug/Makefile

@@ -34,7 +34,7 @@ endef
 
 MAKE_OPTS:= \
 	$(KERNEL_MAKE_FLAGS) \
-	SUBDIRS="$(PKG_BUILD_DIR)"
+	M="$(PKG_BUILD_DIR)"
 
 define Build/Compile
 	$(MAKE) -C "$(LINUX_DIR)" \

package/kernel/gpio-nct5104d/Makefile

@@ -38,7 +38,7 @@ EXTRA_CFLAGS:= \
 
 MAKE_OPTS:= \
 	$(KERNEL_MAKE_FLAGS) \
-	SUBDIRS="$(PKG_BUILD_DIR)" \
+	M="$(PKG_BUILD_DIR)" \
 	EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
 	$(EXTRA_KCONFIG)
 

package/kernel/hwmon-gsc/Makefile

@@ -21,7 +21,7 @@ endef
 define Build/Compile
 	$(MAKE) -C "$(LINUX_DIR)" \
 		$(KERNEL_MAKE_FLAGS) \
-		SUBDIRS="$(PKG_BUILD_DIR)" \
+		M="$(PKG_BUILD_DIR)" \
 		EXTRA_CFLAGS="$(BUILDFLAGS)" \
 		modules
 endef

package/kernel/i2c-gpio-custom/Makefile

@@ -34,7 +34,7 @@ EXTRA_CFLAGS:= \
 
 MAKE_OPTS:= \
 	$(KERNEL_MAKE_FLAGS) \
-	SUBDIRS="$(PKG_BUILD_DIR)" \
+	M="$(PKG_BUILD_DIR)" \
 	EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
 	$(EXTRA_KCONFIG)
 

package/kernel/kmod-sched-cake/Makefile

@@ -36,7 +36,7 @@ define KernelPackage/sched-cake/description
 endef
 
 define Build/Compile
-	$(KERNEL_MAKE) SUBDIRS="$(PKG_BUILD_DIR)" modules
+	$(KERNEL_MAKE) M="$(PKG_BUILD_DIR)" modules
 endef
 
 $(eval $(call KernelPackage,sched-cake))

package/kernel/leds-apu2/Makefile

@@ -38,7 +38,7 @@ EXTRA_CFLAGS:= \
 
 MAKE_OPTS:= \
 	$(KERNEL_MAKE_FLAGS) \
-	SUBDIRS="$(PKG_BUILD_DIR)" \
+	M="$(PKG_BUILD_DIR)" \
 	EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
 	$(EXTRA_KCONFIG)
 

package/kernel/mt76/Makefile

@@ -202,7 +202,7 @@ define Build/Compile
 	+$(MAKE) $(PKG_JOBS) -C "$(LINUX_DIR)" \
 		$(KERNEL_MAKE_FLAGS) \
 		$(PKG_MAKE_FLAGS) \
-		SUBDIRS="$(PKG_BUILD_DIR)" \
+		M="$(PKG_BUILD_DIR)" \
 		NOSTDINC_FLAGS="$(NOSTDINC_FLAGS)" \
 		modules
 endef

package/kernel/mwlwifi/Makefile

@@ -44,7 +44,7 @@ NOSTDINC_FLAGS = \
 define Build/Compile
 	+$(MAKE) $(PKG_JOBS) -C "$(LINUX_DIR)" \
 		$(KERNEL_MAKE_FLAGS) \
-		SUBDIRS="$(PKG_BUILD_DIR)" \
+		M="$(PKG_BUILD_DIR)" \
 		NOSTDINC_FLAGS="$(NOSTDINC_FLAGS)" \
 		modules
 endef

package/kernel/nat46/Makefile

@@ -26,7 +26,7 @@ endef
 include $(INCLUDE_DIR)/kernel-defaults.mk
 
 define Build/Compile
-	$(KERNEL_MAKE) SUBDIRS="$(PKG_BUILD_DIR)/nat46/modules" \
+	$(KERNEL_MAKE) M="$(PKG_BUILD_DIR)/nat46/modules" \
 		MODFLAGS="-DMODULE -mlong-calls" \
 		EXTRA_CFLAGS="-DNAT46_VERSION=\\\"$(PKG_SOURCE_VERSION)\\\"" \
 		modules

package/kernel/rtc-rv5c386a/Makefile

@@ -24,7 +24,7 @@ endef
 define Build/Compile
 	$(MAKE) -C "$(LINUX_DIR)" \
 		$(KERNEL_MAKE_FLAGS) \
-		SUBDIRS="$(PKG_BUILD_DIR)" \
+		M="$(PKG_BUILD_DIR)" \
 		EXTRA_CFLAGS="$(BUILDFLAGS)" \
 		modules
 endef

package/kernel/rtl8812au-ct/Makefile

@@ -45,7 +45,7 @@ NOSTDINC_FLAGS+=-DCONFIG_IOCTL_CFG80211 -DRTW_USE_CFG80211_STA_EVENT -DBUILD_OPE
 define Build/Compile
 	+$(MAKE) $(PKG_JOBS) -C "$(LINUX_DIR)" \
 		$(KERNEL_MAKE_FLAGS) \
-		SUBDIRS="$(PKG_BUILD_DIR)" \
+		M="$(PKG_BUILD_DIR)" \
 		NOSTDINC_FLAGS="$(NOSTDINC_FLAGS)" \
 		modules
 endef

package/kernel/spi-gpio-custom/Makefile

@@ -34,7 +34,7 @@ EXTRA_CFLAGS:= \
 
 MAKE_OPTS:= \
 	$(KERNEL_MAKE_FLAGS) \
-	SUBDIRS="$(PKG_BUILD_DIR)" \
+	M="$(PKG_BUILD_DIR)" \
 	EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
 	$(EXTRA_KCONFIG)
 

package/kernel/trelay/Makefile

@@ -32,7 +32,7 @@ endef
 include $(INCLUDE_DIR)/kernel-defaults.mk
 
 define Build/Compile
-	$(KERNEL_MAKE) SUBDIRS="$(PKG_BUILD_DIR)" modules
+	$(KERNEL_MAKE) M="$(PKG_BUILD_DIR)" modules
 endef
 
 define KernelPackage/trelay/conffiles

package/kernel/w1-gpio-custom/Makefile

@@ -34,7 +34,7 @@ EXTRA_CFLAGS:= \
 
 MAKE_OPTS:= \
 	$(KERNEL_MAKE_FLAGS) \
-	SUBDIRS="$(PKG_BUILD_DIR)" \
+	M="$(PKG_BUILD_DIR)" \
 	EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
 	$(EXTRA_KCONFIG)