pmic: pm8x41 : Add support for hard reset PON bit.

We can now check if the pon reason is due to a hard reset.

Change-Id: Ifb0d27959fd4bd5ede21690bb41415fb67f78274
diff --git a/dev/pmic/pm8x41/include/pm8x41.h b/dev/pmic/pm8x41/include/pm8x41.h
index 45f3bc7..731528c 100644
--- a/dev/pmic/pm8x41/include/pm8x41.h
+++ b/dev/pmic/pm8x41/include/pm8x41.h
@@ -70,6 +70,7 @@
 
 
 /*Target power on reasons*/
+#define HARD_RST                1
 #define DC_CHG                  8
 #define USB_CHG                 16
 #define PON1                    32