drm/vc4: crtc: Switch to of_device_get_match_data

of_device_get_match_data allow to simplify a bit the retrieval of the data
associated to the pixelvalve compatible. Let's use it.
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/1ff06413a1350d28bc3e88b034ed7ad23834e5bd.1590594512.git-series.maxime@cerno.tech

drivers/gpu/drm/vc4/vc4_crtc.c

@@ -1128,10 +1128,10 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct drm_device *drm = dev_get_drvdata(master);
+	const struct vc4_crtc_data *pv_data;
 	struct vc4_crtc *vc4_crtc;
 	struct drm_crtc *crtc;
 	struct drm_plane *primary_plane, *destroy_plane, *temp;
-	const struct of_device_id *match;
 	int ret, i;
 
 	vc4_crtc = devm_kzalloc(dev, sizeof(*vc4_crtc), GFP_KERNEL);
@@ -1139,10 +1139,10 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
 		return -ENOMEM;
 	crtc = &vc4_crtc->base;
 
-	match = of_match_device(vc4_crtc_dt_match, dev);
-	if (!match)
+	pv_data = of_device_get_match_data(dev);
+	if (!pv_data)
 		return -ENODEV;
-	vc4_crtc->data = match->data;
+	vc4_crtc->data = pv_data;
 	vc4_crtc->pdev = pdev;
 
 	vc4_crtc->regs = vc4_ioremap_regs(pdev, 0);
@@ -1197,7 +1197,7 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
 
 	platform_set_drvdata(pdev, vc4_crtc);
 
-	vc4_debugfs_add_regset32(drm, vc4_crtc->data->debugfs_name,
+	vc4_debugfs_add_regset32(drm, pv_data->debugfs_name,
 				 &vc4_crtc->regset);
 
 	return 0;