[media] wl128x: use swap() in fm_rdsparse_swapbytes()

Use kernel.h macro definition.

Thanks to Julia Lawall for Coccinelle scripting support.

Signed-off-by: Fabian Frederick <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/radio/wl128x/fmdrv_common.c

···
 static void fm_rdsparse_swapbytes(struct fmdev *fmdev,
 		struct fm_rdsdata_format *rds_format)
 {
-	u8 byte1;
 	u8 index = 0;
 	u8 *rds_buff;
 
···
 	if (fmdev->asci_id != 0x6350) {
 		rds_buff = &rds_format->data.groupdatabuff.buff[0];
 		while (index + 1 < FM_RX_RDS_INFO_FIELD_MAX) {
-			byte1 = rds_buff[index];
-			rds_buff[index] = rds_buff[index + 1];
-			rds_buff[index + 1] = byte1;
+			swap(rds_buff[index], rds_buff[index + 1]);
 			index += 2;
 		}
 	}