drm/panel: simple: Add Tianma TM050RDH03 panel

Add the Tianma Micro-electronics TM050RDH03 5.0" WVGA TFT LCD panel.

Reuse panel ontat,kd50g21-40nt-a1's panel description as they are
identical.

Signed-off-by: Liu Ying <victor.liu@nxp.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260227-tianma-tm050rdh03-v1-2-cab78a0d765d@nxp.com

Author: Liu Ying

drivers/gpu/drm/panel/panel-simple.c

@@ -5640,6 +5640,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "tianma,p0700wxf1mbaa",
 		.data = &tianma_p0700wxf1mbaa,
+	}, {
+		.compatible = "tianma,tm050rdh03",
+		.data = &ontat_kd50g21_40nt_a1,
 	}, {
 		.compatible = "tianma,tm070jdhg30",
 		.data = &tianma_tm070jdhg30,