AndroidBoot: Change to mark board have PM660 PMIC

Change to mark board have PM660 PMIC.

Change-Id: I8470f3ca6ab0b60046550e9ef2656321d3084318
diff --git a/AndroidBoot.mk b/AndroidBoot.mk
index efecfa5..d23280e 100644
--- a/AndroidBoot.mk
+++ b/AndroidBoot.mk
@@ -37,7 +37,7 @@
   ENABLE_BOOTDEVICE_MOUNT := ENABLE_BOOTDEVICE_MOUNT=1
 endif
 
-ifeq ($(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_PM660),true)
+ifeq ($(BOARD_HAVE_PM660),true)
   ENABLE_BG_SUPPORT := ENABLE_BG_SUPPORT=1
 endif