MAINTAINERS: Add maintainer for samsung mfd driver

There are many samsung multifunction devices which are
s2mps11, s5m8767, s5m8763 etc.
This devices can support regulator, rtc, charger.
I will be supporting the Samsung mfd drivers, that are currently
in development and will be upstreamed shortly.
Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

MAINTAINERS

@@ -5866,6 +5866,16 @@ L:	linux-fbdev@vger.kernel.org
 S:	Maintained
 F:	drivers/video/s3c-fb.c
 
+SAMSUNG MULTIFUNCTION DEVICE DRIVERS
+M:	Sangbeom Kim <sbkim73@samsung.com>
+L:	linux-kernel@vger.kernel.org
+S:	Supported
+F:	drivers/mfd/sec*.c
+F:	drivers/regulator/s2m*.c
+F:	drivers/regulator/s5m*.c
+F:	drivers/rtc/rtc-sec.c
+F:	include/linux/mfd/samsung/
+
 SERIAL DRIVERS
 M:	Alan Cox <alan@linux.intel.com>
 L:	linux-serial@vger.kernel.org