media: saa7134: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning
by explicitly adding a break statement instead of letting the code fall
through to the next case.

Link: https://github.com/KSPP/linux/issues/115
[hverkuil: fix checkpatch TAB indendation issues]
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/pci/saa7134/saa7134-tvaudio.c

@@ -885,6 +885,7 @@ void saa7134_enable_i2s(struct saa7134_dev *dev)
 		saa_writeb(SAA7134_I2S_OUTPUT_FORMAT, i2s_format);
 		saa_writeb(SAA7134_I2S_OUTPUT_LEVEL,  0x0F);
 		saa_writeb(SAA7134_I2S_AUDIO_OUTPUT,  0x01);
+		break;
 
 	default:
 		break;