media: dvb_frontend: 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/115Signed-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/dvb-core/dvb_frontend.c

@@ -984,6 +984,7 @@ static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 				 fe->ops.info.symbol_rate_max);
 			return -EINVAL;
 		}
+		break;
 	default:
 		break;
 	}