media: venus: core: add shutdown callback for venus

After the SMMU translation is disabled in the
arm-smmu shutdown callback during reboot, if
any subsystem are still alive then IOVAs they
are using will become PAs on bus, which may
lead to crash.

So implemented shutdown callback, which detach iommu maps.

Signed-off-by: Mansur Alisha Shaik <[e-mail]>
Signed-off-by: Stanimir Varbanov <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

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

···
 	return ret;
 }
 
+static void venus_core_shutdown(struct platform_device *pdev)
+{
+	struct venus_core *core = platform_get_drvdata(pdev);
+
+	venus_shutdown(core);
+	venus_firmware_deinit(core);
+}
+
 static __maybe_unused int venus_runtime_suspend(struct device *dev)
 {
 	struct venus_core *core = dev_get_drvdata(dev);
···
 		.of_match_table = venus_dt_match,
 		.pm = &venus_pm_ops,
 	},
+	.shutdown = venus_core_shutdown,
 };
 module_platform_driver(qcom_venus_driver);