target: msm8909: update mdp3 clock gating setting

Disable DMA_P HW clock gating and follow correct
robust LUT programing sequence.

Change-Id: I24d8ed58f5be7c7460de18de834025462e23e3f4
diff --git a/target/msm8909/target_display.c b/target/msm8909/target_display.c
index 6a7f3b8..803c5f2 100755
--- a/target/msm8909/target_display.c
+++ b/target/msm8909/target_display.c
@@ -247,7 +247,7 @@
 		 * Enable auto functional gating
 		 * on DSI CMD AXI fetch from DDR
 		 */
-		writel(0x3ffff, MDP_CGC_EN);
+		writel(0x3fbff, MDP_CGC_EN);
 		ret = restore_secure_cfg(SECURE_DEVICE_MDSS);
 		if (ret) {
 			dprintf(CRITICAL,