[media] fmdrv: Don't check if unsigned are below zero

drivers/media/radio/wl128x/fmdrv_common.c:745:3: warning: comparison is always false due to limited range of data type [-Wtype-limits]
drivers/media/radio/wl128x/fmdrv_rx.c:308:2: warning: comparison is always false due to limited range of data type [-Wtype-limits]

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/radio/wl128x/fmdrv_common.c

@@ -742,7 +742,7 @@ static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *fmdev)
 		if ((meta_data & FM_RDS_STATUS_ERR_MASK) != 0)
 			break;
 
-		if (blk_idx < FM_RDS_BLK_IDX_A || blk_idx > FM_RDS_BLK_IDX_D) {
+		if (blk_idx > FM_RDS_BLK_IDX_D) {
 			fmdbg("Block sequence mismatch\n");
 			rds->last_blk_idx = -1;
 			break;

drivers/media/radio/wl128x/fmdrv_rx.c

@@ -305,7 +305,7 @@ int fm_rx_set_volume(struct fmdev *fmdev, u16 vol_to_set)
 	if (fmdev->curr_fmmode != FM_MODE_RX)
 		return -EPERM;
 
-	if (vol_to_set < FM_RX_VOLUME_MIN || vol_to_set > FM_RX_VOLUME_MAX) {
+	if (vol_to_set > FM_RX_VOLUME_MAX) {
 		fmerr("Volume is not within(%d-%d) range\n",
 			   FM_RX_VOLUME_MIN, FM_RX_VOLUME_MAX);
 		return -EINVAL;