Input: gpio-keys - add support for setting device name

This patch allows to set a device name which helps distinguishing several
gpio-keys devices.

Signed-off-by: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/include/linux/gpio_keys.h b/include/linux/gpio_keys.h
index 3204edf..b5ca4b2 100644
--- a/include/linux/gpio_keys.h
+++ b/include/linux/gpio_keys.h
@@ -22,6 +22,7 @@
 	unsigned int rep:1;		/* enable input subsystem auto repeat */
 	int (*enable)(struct device *dev);
 	void (*disable)(struct device *dev);
+	const char *name;		/* input device name */
 };
 
 #endif