BOARD_CHARGER_ENABLE_SUSPEND becomes ro.charger.enable_suspend

Define ro.charger.enable_suspend to true as charger no
longer uses BOARD_CHARGER_ENABLE_SUSPEND.

Bug: 153937817
Change-Id: Ic76bf3a66c5e21c74e49607f54d6c0358c31bbac
Signed-off-by: Redick Lin <redicklin@google.com>
diff --git a/device-common.mk b/device-common.mk
index 0a9ccec..0cc87e4 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -70,6 +70,10 @@
 	ro.config.low_ram = false \
 	ro.lmk.log_stats = true \
 
+# charger
+PRODUCT_PRODUCT_PROPERTIES += \
+	ro.charger.enable_suspend=true
+
 # Modem loging file
 PRODUCT_COPY_FILES += \
     device/google/sunfish/init.logging.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/hw/init.$(PRODUCT_PLATFORM).logging.rc