msm8960: set the boot_done flag in pm8921 on fastboot

Change-Id: I9317c035cf2b13f3e29d4b43c0831060001008fd
diff --git a/app/aboot/aboot.c b/app/aboot/aboot.c
index 6ee26a3..751a598 100644
--- a/app/aboot/aboot.c
+++ b/app/aboot/aboot.c
@@ -900,6 +900,8 @@
 
 fastboot:
 
+       target_fastboot_init();
+
 	if(!usb_init)
 		udc_init(&surf_udc_device);