media: venus: core: Add missing mutex destroy

This adds missing mutex_destroy in remove method of venus core driver.
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/qcom/venus/core.c

@@ -335,6 +335,7 @@ static int venus_remove(struct platform_device *pdev)
 
 	v4l2_device_unregister(&core->v4l2_dev);
 	mutex_destroy(&core->pm_lock);
+	mutex_destroy(&core->lock);
 
 	return ret;
 }