Add support for armv7 for qemuarm and generic-armv7a

Add real kernel config fragments for armv7a.
Support qemuarm from oe-core and generic-armv7a from meta-openamp-bsp.

Add a placeholder file to add things to multi_arm_v7 to make it match
arm64 defconfig.  However currently nothing found.

Signed-off-by: Bill Mills <bill.mills@linaro.org>

recipes-kernel/linux/linux-%.bbappend

@@ -6,3 +6,5 @@ KERNEL_FEATURES:append = "${@bb.utils.contains('DISTRO_FEATURES', 'openamp', ' c
 # genericarm64 via qemuarm64 w/ openamp distro feature
 KERNEL_FEATURES:qemuarm64:append = "${@bb.utils.contains('DISTRO_FEATURES', 'openamp', ' cfg/remoteproc-generic-arm64.scc', '', d)}"
 KERNEL_FEATURES:generic-arm64:append = "${@bb.utils.contains('DISTRO_FEATURES', 'openamp', ' cfg/remoteproc-generic-arm64.scc', '', d)}"
+KERNEL_FEATURES:qemuarm:append = "${@bb.utils.contains('DISTRO_FEATURES', 'openamp', ' cfg/remoteproc-generic-armv7a.scc', '', d)}"
+KERNEL_FEATURES:generic-armv7a:append = "${@bb.utils.contains('DISTRO_FEATURES', 'openamp', ' cfg/remoteproc-generic-armv7a.scc', '', d)}"

recipes-kernel/linux/openamp-kmeta/cfg/armv7a-feature-parity.cfg

@@ -0,0 +1,4 @@
+# multi_arm_v7 is a good start but has a lot of things turned off compared to
+# arm64 defconfig, make them more the same
+
+# nothing found so far

recipes-kernel/linux/openamp-kmeta/cfg/remoteproc-armv7a.cfg

@@ -0,0 +1,47 @@
+#
+# HW spinlocl drivers
+#
+CONFIG_HWSPINLOCK=y
+CONFIG_HWSPINLOCK_OMAP=y
+CONFIG_HWSPINLOCK_QCOM=y
+CONFIG_HWSPINLOCK_STM32=y
+CONFIG_HWSPINLOCK_SUN6I=y
+CONFIG_HSEM_U8500=y
+
+#
+# Mailbox drivers
+#
+CONFIG_OMAP2PLUS_MBOX=y
+CONFIG_OMAP_MBOX_KFIFO_SIZE=256
+CONFIG_STI_MBOX=y
+CONFIG_TI_MESSAGE_MANAGER=y
+CONFIG_MAILBOX_TEST=m
+CONFIG_STM32_IPCC=y
+CONFIG_QCOM_IPCC=y
+
+#
+# Remoteproc drivers
+#
+CONFIG_REMOTEPROC_CDEV=y
+CONFIG_IMX_REMOTEPROC=m
+CONFIG_IMX_DSP_REMOTEPROC=m
+CONFIG_MTK_SCP=m
+CONFIG_WKUP_M3_RPROC=m
+CONFIG_KEYSTONE_REMOTEPROC=m
+CONFIG_MESON_MX_AO_ARC_REMOTEPROC=m
+CONFIG_QCOM_SYSMON=m
+CONFIG_RCAR_REMOTEPROC=m
+CONFIG_ST_REMOTEPROC=m
+CONFIG_ST_SLIM_REMOTEPROC=m
+CONFIG_STM32_RPROC=m
+
+#
+# Rpmsg drivers
+#
+CONFIG_RPMSG=m
+CONFIG_RPMSG_CHAR=m
+CONFIG_RPMSG_NS=m
+CONFIG_RPMSG_MTK_SCP=m
+CONFIG_RPMSG_QCOM_GLINK=m
+CONFIG_RPMSG_QCOM_GLINK_RPM=m
+CONFIG_RPMSG_VIRTIO=m

recipes-kernel/linux/openamp-kmeta/cfg/remoteproc-generic-armv7a.scc

@@ -0,0 +1,6 @@
+define KFEATURE_DESCRIPTION "OpenAMP Generic ARM64 Kernel Support"
+define KFEATURE_COMPATIBILITY arch
+
+kconf non-hardware basic.cfg
+kconf non-hardware armv7a-feature-parity.cfg
+kconf non-hardware remoteproc-armv7a.cfg