[msm]: Enable display driver by default for splash screen on 7627 & 8650

If rgb565 image is available in splash partition then display it
as splash screen.

On Linux, splash.img can be created as follows:
convert -depth 8 splash.png rgb:- | out/host/linux-x86/bin/rgb2565  > splash.img

Change-Id: I24b61cbc94af4bac14b9a49b030b59484a0b283e
diff --git a/target/msm7627_ffa/init.c b/target/msm7627_ffa/init.c
index 6c9ea7d..db58e21 100644
--- a/target/msm7627_ffa/init.c
+++ b/target/msm7627_ffa/init.c
@@ -65,12 +65,17 @@
 		.name = "system",
 	},
 	{
-		.start = 800,
+                .start = 800,
+                .length = 8,
+                .name = "splash",
+	},
+	{
+		.start = 808,
 		.length = 40  /* 5MB */,
 		.name = "cache",
 	},
 	{
-		.start = 840,
+		.start = 848,
 		.length = VARIABLE_LENGTH,
 		.name = "userdata",
 	},