drm/msm/mdp5: Update compatible strings for MDSS/MDP5

Introduce new compatible strings for the top level MDSS wrapper device,
and the MDP5 device.

Previously, the "qcom,mdp5" and "qcom,mdss_mdp" compatible strings
were used to match the top level platform_device (which was also tied
to the top level drm_device struct). Now, these strings are used
to match the MDP5 platform device.

Use "qcom,mdss" as the compatible string for top level MDSS device.
This is now used to match the top level platform_device (which is
tied to the drm_device struct).

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c

@@ -809,12 +809,20 @@ static int mdp5_dev_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id mdp5_dt_match[] = {
+	{ .compatible = "qcom,mdp5", },
+	/* to support downstream DT files */
+	{ .compatible = "qcom,mdss_mdp", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mdp5_dt_match);
+
 static struct platform_driver mdp5_driver = {
 	.probe = mdp5_dev_probe,
 	.remove = mdp5_dev_remove,
 	.driver = {
 		.name = "msm_mdp",
-		/* Add a DT match field once we move to new hierarchy */
+		.of_match_table = mdp5_dt_match,
 	},
 };