Input: edt-ft5x06 - fix an i2c write for M09 support

The driver sends 3 bytes instead of 2 when accessing a register on the M09
firmware, so writing to gain seems to overflow into the offset register.

Signed-off-by: Robert Woerle <robert@linuxdevelopment.de>
Acked-By: Simon Budig <simon.budig@kernelconcepts.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index f8815be..d4f3399 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -271,7 +271,7 @@
 		wrbuf[0] = addr;
 		wrbuf[1] = value;
 
-		return edt_ft5x06_ts_readwrite(tsdata->client, 3,
+		return edt_ft5x06_ts_readwrite(tsdata->client, 2,
 					wrbuf, 0, NULL);
 
 	default: