media: au8522: improve formatting

This patch fixes the following scripts/checkpatch.pl errors:

ERROR: space required before the open parenthesis '('
+	switch(input) {
Suggested-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/dvb-frontends/au8522_decoder.c

@@ -562,7 +562,7 @@ static int au8522_s_video_routing(struct v4l2_subdev *sd,
 {
 	struct au8522_state *state = to_state(sd);
 
-	switch(input) {
+	switch (input) {
 	case AU8522_COMPOSITE_CH1:
 	case AU8522_SVIDEO_CH13:
 	case AU8522_COMPOSITE_CH4_SIF: