Input: mpr121 - remove unused field in struct mpr121_touchkey

Remove unused key_val field in struct mpr121_touchkey.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/mpr121_touchkey.c

@@ -59,7 +59,6 @@
 struct mpr121_touchkey {
 	struct i2c_client	*client;
 	struct input_dev	*input_dev;
-	unsigned int		key_val;
 	unsigned int		statusbits;
 	unsigned int		keycount;
 	u16			keycodes[MPR121_MAX_KEY_COUNT];