drm: xlnx: zynqmp_dpsub: switch to ->edid_read callback

Prefer using the struct drm_edid based callback and functions.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/549694273b57e7275de01daf8ce60579121998d4.1706038510.git.jani.nikula@intel.com

drivers/gpu/drm/xlnx/zynqmp_dp.c

@@ -1560,12 +1560,12 @@ static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *brid
 	return connector_status_disconnected;
 }
 
-static struct edid *zynqmp_dp_bridge_get_edid(struct drm_bridge *bridge,
+static const struct drm_edid *zynqmp_dp_bridge_edid_read(struct drm_bridge *bridge,
 							 struct drm_connector *connector)
 {
 	struct zynqmp_dp *dp = bridge_to_dp(bridge);
 
-	return drm_get_edid(connector, &dp->aux.ddc);
+	return drm_edid_read_ddc(connector, &dp->aux.ddc);
 }
 
 static const struct drm_bridge_funcs zynqmp_dp_bridge_funcs = {
@@ -1579,7 +1579,7 @@ static const struct drm_bridge_funcs zynqmp_dp_bridge_funcs = {
 	.atomic_reset = drm_atomic_helper_bridge_reset,
 	.atomic_check = zynqmp_dp_bridge_atomic_check,
 	.detect = zynqmp_dp_bridge_detect,
-	.get_edid = zynqmp_dp_bridge_get_edid,
+	.edid_read = zynqmp_dp_bridge_edid_read,
 };
 
 /* -----------------------------------------------------------------------------