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/include/target.h b/include/target.h
index c2783fc..144b346 100644
--- a/include/target.h
+++ b/include/target.h
@@ -52,7 +52,7 @@
 uint32_t target_boot_device_emmc();
 
 bool target_display_panel_node(char *pbuf, uint16_t buf_size);
-void target_display_init(void);
+void target_display_init(const char *panel_name);
 void target_display_shutdown(void);
 
 uint32_t target_get_boot_device();