dev: pmic: pm8x41 : Add api to get boot type

We now have the ability to detect if the current boot is a cold or
a warm boot.

Change-Id: Iac7ae00352a7886e14076fa5bc56e1ad1fcd006d
diff --git a/dev/pmic/pm8x41/include/pm8x41_hw.h b/dev/pmic/pm8x41/include/pm8x41_hw.h
index 8a275ad..9c10ab8 100644
--- a/dev/pmic/pm8x41/include/pm8x41_hw.h
+++ b/dev/pmic/pm8x41/include/pm8x41_hw.h
@@ -57,6 +57,8 @@
 
 /* PON Peripheral registers */
 #define PON_PON_REASON1                       0x808
+#define PON_WARMBOOT_STATUS1                  0x80A
+#define PON_WARMBOOT_STATUS2                  0x80B
 #define PON_INT_RT_STS                        0x810
 #define PON_INT_SET_TYPE                      0x811
 #define PON_INT_POLARITY_HIGH                 0x812