[media] drivers/media: Convert remaining use of pr_warning to pr_warn

To enable eventual removal of pr_warning

This makes pr_warn use consistent for drivers/media

Prior to this patch, there was 1 use of pr_warning and
310 uses of pr_warn in drivers/media
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/sh_vou.c

@@ -813,8 +813,8 @@ static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
 {
 	switch (bus_fmt) {
 	default:
-		pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
-			   __func__, bus_fmt);
+		pr_warn("%s(): Invalid bus-format code %d, using default 8-bit\n",
+			__func__, bus_fmt);
 	case SH_VOU_BUS_8BIT:
 		return 1;
 	case SH_VOU_BUS_16BIT: