kernel: add package kmod-gpio-cascade

Adds kernel module for Generic GPIO cascade.

Signed-off-by: Mauri Sandberg <maukka@ext.kapsi.fi>
Signed-off-by: Petr Štetiar <ynezz@true.cz> [missing commit description]

package/kernel/linux/modules/gpio-cascade.mk

@@ -0,0 +1,20 @@
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+MENU_TITLE:=GPIO support
+
+define KernelPackage/gpio-cascade
+  SUBMENU:=$(MENU_TITLE)
+  TITLE:=Generic GPIO cascade
+  KCONFIG:=CONFIG_GPIO_CASCADE
+  DEPENDS:=@GPIO_SUPPORT +kmod-mux-core
+  FILES:=$(LINUX_DIR)/drivers/gpio/gpio-cascade.ko
+  AUTOLOAD:=$(call AutoLoad,29,gpio-cascade,1)
+endef
+
+define KernelPackage/gpio-cascade/description
+  Kernel module for Generic GPIO cascade
+endef
+
+$(eval $(call KernelPackage,gpio-cascade))