target: add support for specifying display panel during init

Modify the display init API to add the ability to specify a
particular panel to be initialized in lieu of using the default
panel for the target.

Change-Id: I105806a9d66fa9f45d5899a56f9ae6b28b097d73
diff --git a/target/msm7627a/target_display.c b/target/msm7627a/target_display.c
index 2fcb04c..94270b5 100755
--- a/target/msm7627a/target_display.c
+++ b/target/msm7627a/target_display.c
@@ -69,7 +69,7 @@
 	}
 	return ret;
 }
-void target_display_init(void)
+void target_display_init(const char *panel_name)
 {
 	unsigned mach_type;
 	mach_type = board_machtype();