drm/meson/meson_venc: Relax the supported mode checks

Relax a bit the supported modes list by including also 480x1920 and
400x1280. This was actually tested on real hardware and it works
correctly.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230210-relax_dmt_limits-v2-1-318913f08121@baylibre.com

drivers/gpu/drm/meson/meson_venc.c

@@ -866,10 +866,10 @@ meson_venc_hdmi_supported_mode(const struct drm_display_mode *mode)
 			    DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC))
 		return MODE_BAD;
 
-	if (mode->hdisplay < 640 || mode->hdisplay > 1920)
+	if (mode->hdisplay < 400 || mode->hdisplay > 1920)
 		return MODE_BAD_HVALUE;
 
-	if (mode->vdisplay < 480 || mode->vdisplay > 1200)
+	if (mode->vdisplay < 480 || mode->vdisplay > 1920)
 		return MODE_BAD_VVALUE;
 
 	return MODE_OK;