[media] v4l: tvp5150: Add missing break in set control handler

A break is missing resulting in the hue control enabling or disabling
the decode completely. Fix it.

Fixes: c43875f6

 ("[media] tvp5150: replace MEDIA_ENT_F_CONN_TEST by a control")

Cc: stable@vger.kernel.org
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>