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/msm8974/target_display.c b/target/msm8974/target_display.c
index e939f34..8a21e98 100755
--- a/target/msm8974/target_display.c
+++ b/target/msm8974/target_display.c
@@ -330,7 +330,7 @@
 	return 0;
 }
 
-void target_display_init(void)
+void target_display_init(const char *panel_name)
 {
 	uint32_t hw_id = board_hardware_id();
 	uint32_t panel_loop = 0;