mfd: Update chip id of 88pm8607

Chipid of 88pm8607 is 0x40 or 0x50.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/include/linux/mfd/88pm860x.h b/include/linux/mfd/88pm860x.h
index bfd23be..4db1fbd 100644
--- a/include/linux/mfd/88pm860x.h
+++ b/include/linux/mfd/88pm860x.h
@@ -138,7 +138,7 @@
 	PM8607_ID_RG_MAX,
 };
 
-#define PM8607_VERSION			(0x40)	/* 8607 chip ID */
+/* 8607 chip ID is 0x40 or 0x50 */
 #define PM8607_VERSION_MASK		(0xF0)	/* 8607 chip ID mask */
 
 /* Interrupt Registers */