msm8960: set the boot_done flag in pm8921 on fastboot

Change-Id: I9317c035cf2b13f3e29d4b43c0831060001008fd
diff --git a/target/msm8960/rules.mk b/target/msm8960/rules.mk
index bfab671..9ffd5af 100644
--- a/target/msm8960/rules.mk
+++ b/target/msm8960/rules.mk
@@ -24,6 +24,7 @@
 
 MODULES += \
 	dev/keys \
+	dev/pmic/pm8921 \
 	lib/ptable
 
 DEFINES += \