[media] omap3isp: Add missing mutex_destroy() calls

Mutexes must be destroyed with mutex_destroy(). Add missing calls in the
modules cleanup handlers.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
4 files changed