dev: gcdb: display: fix white screen issue for 8909 SKUT

For 8909 SKUT fl10802 DCS backlight control panel, backlight
should be enabled after video data available to avoid white
screen flash when display power on.

Change-Id: I6940ff7939d409911c31c9958bb53ec709e055d7
diff --git a/target/msm8909/oem_panel.c b/target/msm8909/oem_panel.c
index 6d84eef..7b6e473 100644
--- a/target/msm8909/oem_panel.c
+++ b/target/msm8909/oem_panel.c
@@ -319,6 +319,7 @@
 		memcpy(phy_db->timing,
 				fl10802_fwvga_video_timings, TIMING_SIZE);
 		pinfo->mipi.signature = FL10802_FWVGA_VIDEO_SIGNATURE;
+		pinfo->mipi.cmds_post_tg = 1;
 		break;
 	case UNKNOWN_PANEL:
 	default: