meta-phosphor: add raspberrypi folder: add linux-kernel gpio-key patch

Add raspberrypi folder in meta-phosphor match phosphor related
package.

Add phosphor-gpio-keys cfg for build phosphor related kernel.

Change-Id: Ia3964629abc2d8f83d20d227f901a63f15927372
Signed-off-by: Samuel Jiang <chyishian.jiang@gmail.com>
diff --git a/raspberrypi/recipes-kernel/linux/linux-raspberrypi/phosphor-gpio-keys.cfg b/raspberrypi/recipes-kernel/linux/linux-raspberrypi/phosphor-gpio-keys.cfg
new file mode 100644
index 0000000..f5c01be
--- /dev/null
+++ b/raspberrypi/recipes-kernel/linux/linux-raspberrypi/phosphor-gpio-keys.cfg
@@ -0,0 +1,7 @@
+CONFIG_INPUT_KEYBOARD=y
+# CONFIG_INPUT_LEDS is not set
+# CONFIG_INPUT_MOUSDEV is not set
+CONFIG_INPUT_EVDEV=y
+# CONFIG_KEYBOARD_ATKBD is not set
+CONFIG_KEYBOARD_GPIO=y
+# CONFIG_INPUT_MOUSE is not set