[platform]: Add code to enable display initialization only in fastboot mode.

Add code for all targets to enable display only in fastboot mode.
Enable FB-debugging for qsd8k surf to see messages in fastboot mode.
diff --git a/app/aboot/aboot.c b/app/aboot/aboot.c
index 4fc76d8..2a66fbb 100755
--- a/app/aboot/aboot.c
+++ b/app/aboot/aboot.c
@@ -374,6 +374,8 @@
 		"to fastboot mode.\n");
 
 fastboot:
+        display_init();
+	dprintf(INFO, "Diplay initialized\n");
 	udc_init(&surf_udc_device);
 
 	fastboot_register("boot", cmd_boot);