hwc/overlay: Set MDP_SOLID_FILL flag for Color layer.

Set MDP_SOLID_FILL flag while configuring MDP pipe for Color layer.

Change-Id: Ia48e6e3e759ae026510544cad8a6c1a6256d82e7
diff --git a/liboverlay/overlayUtils.h b/liboverlay/overlayUtils.h
index 55f1767..904d607 100644
--- a/liboverlay/overlayUtils.h
+++ b/liboverlay/overlayUtils.h
@@ -271,6 +271,7 @@
     OV_MDP_PP_EN = MDP_OVERLAY_PP_CFG_EN,
     OV_MDSS_MDP_BWC_EN = MDP_BWC_EN,
     OV_MDSS_MDP_DUAL_PIPE = MDSS_MDP_DUAL_PIPE,
+    OV_MDP_SOLID_FILL = MDP_SOLID_FILL,
 };
 
 enum eZorder {