msm: charger: Signal power on battery charging only for wall charger

Early bootloaders indicate if power on reason is normal boot,
due to USB charger or a wall charger.  Indicate kernel to go to
charging mode only if wall charger is connected.

OEMs who want to set policy to go to power on charging in case of
usb and wall charger should update the condition check accordingly.

Change-Id: I3a44790fb1f664ab84c4720a6f463e0e1405d6ca
diff --git a/target/msm7627a/init.c b/target/msm7627a/init.c
index facf181..70ab020 100644
--- a/target/msm7627a/init.c
+++ b/target/msm7627a/init.c
@@ -416,7 +416,7 @@
 
 unsigned target_pause_for_battery_charge(void)
 {
-	if (target_check_power_on_reason() == PWR_ON_EVENT_USB_CHG)
+	if (target_check_power_on_reason() == PWR_ON_EVENT_WALL_CHG)
 		return 1;
 	return 0;
 }