[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>
diff --git a/drivers/media/video/omap3isp/ispccdc.c b/drivers/media/video/omap3isp/ispccdc.c
index c30cc59..3a43be2 100644
--- a/drivers/media/video/omap3isp/ispccdc.c
+++ b/drivers/media/video/omap3isp/ispccdc.c
@@ -2297,4 +2297,6 @@
 
 	if (ccdc->fpc.fpcaddr != 0)
 		omap_iommu_vfree(isp->domain, isp->iommu, ccdc->fpc.fpcaddr);
+
+	mutex_destroy(&ccdc->ioctl_lock);
 }