[media] media: ir-sony-decoder: 15bit function decode fix

The raw Sony IR decoder decodes 15bit messages slightly incorrectly.
To decode the function number, it shifts the bits right by 7 so that the
function is in bits 7:1, masks with 0xFD (0b11111101), and does an 8 bit
reverse so it ends up in bits 6:0. The mask should be 0xFE to correspond
with bits 7:1 (0b11111110).

The old mask had the effect of dropping the MSB of the function number
from bit 6, and leaving the LSB of the device number in bit 7.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/rc/ir-sony-decoder.c

@@ -130,7 +130,7 @@ static int ir_sony_decode(struct rc_dev *dev, struct ir_raw_event ev)
 		case 15:
 			device    = bitrev8((data->bits >>  0) & 0xFF);
 			subdevice = 0;
-			function  = bitrev8((data->bits >>  7) & 0xFD);
+			function  = bitrev8((data->bits >>  7) & 0xFE);
 			break;
 		case 20:
 			device    = bitrev8((data->bits >>  5) & 0xF8);