[media] xc4000: added mutex

This patch adds a mutex to xc4000_priv, to protect the driver
from being accessed by multiple processes at the same time.

Signed-off-by: Istvan Varga <istvan_v@mailbox.hu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1 file changed