Added rule to compile rpmsg-gpio driver in Make and Kconfig

Author: deebot

drivers/rpmsg/Kconfig

@@ -81,4 +81,15 @@ config RPMSG_PRU
 
 	  If unsure, say N.
 
+config CONFIG_RPMSG_GPIOHIP_INTERFACE
+	tristate "A rpmsg driver  with gpiochip interface"
+	default m
+	depends on RPMSG_VIRTIO
+	depends on REMOTEPROC
+	help
+	 This driver provides provides gpiochip inteface which can be accessed
+	 in userspace using libgpiod. You would see a char dev interface in /dev
+	 using this driver. Follow the read me files below for more info:
+	 https://github.com/deebot/Beaglebone-BidirectionBus/tree/dev
+
 endmenu

drivers/rpmsg/Makefile

@@ -9,4 +9,6 @@ obj-$(CONFIG_RPMSG_QCOM_SMD)	+= qcom_smd.o
 obj-$(CONFIG_RPMSG_VIRTIO)	+= virtio_rpmsg_bus.o
 
 obj-$(CONFIG_RPMSG_RPC)		+= rpmsg-rpc.o
+obj-$(CONFIG_RPMSG_GPIOCHIP_INTERFACE)    += rpmsg_gpio.o
 rpmsg-rpc-y			:= rpmsg_rpc.o rpmsg_rpc_sysfs.o rpmsg_rpc_dmabuf.o
+