media: hi556: Add missing '\n' to hi556 error messages

Many hi556 dev_err() error messages miss a terminating '\n', add
the missing '\n' to these.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>