platform: msm_shared: use DSI LDO mode on 8x10

On 8x10, to save the extra cost, the inductor for DSI
PHY on the board will be removed.   The inductor is
used for DSI DCDC mode.  This is to switch to LDO
mode.

Change-Id: I42933efe52bcabaaa71ed479805b06d3138c82b0
diff --git a/platform/msm_shared/mipi_dsi_phy.c b/platform/msm_shared/mipi_dsi_phy.c
index ff7b443..e3a4527 100644
--- a/platform/msm_shared/mipi_dsi_phy.c
+++ b/platform/msm_shared/mipi_dsi_phy.c
@@ -408,6 +408,8 @@
 	writel(0x5F, ctl_base + off + (4 * 0));
 
 	off = 0x500;
+	/* use LDO mode */
+	writel(0x25, ctl_base + 0x4B0);
 	for (i = 0; i < 5; i++)
 		writel(pd->regulator[i], ctl_base + off + (4 * i));