MAINTAINERS: Add ROHM BD71815AGW

Add maintainer entries for ROHM BD71815AGW drivers.
New regulator and GPIO drivers were introduced for these PMICs.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

MAINTAINERS

@@ -15452,18 +15452,21 @@ F:	Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt
 F:	Documentation/devicetree/bindings/regulator/rohm,bd70528-regulator.txt
 F:	drivers/clk/clk-bd718x7.c
 F:	drivers/gpio/gpio-bd70528.c
+F:	drivers/gpio/gpio-bd71815.c
 F:	drivers/gpio/gpio-bd71828.c
 F:	drivers/mfd/rohm-bd70528.c
 F:	drivers/mfd/rohm-bd71828.c
 F:	drivers/mfd/rohm-bd718x7.c
 F:	drivers/power/supply/bd70528-charger.c
 F:	drivers/regulator/bd70528-regulator.c
+F:	drivers/regulator/bd71815-regulator.c
 F:	drivers/regulator/bd71828-regulator.c
 F:	drivers/regulator/bd718x7-regulator.c
 F:	drivers/regulator/rohm-regulator.c
 F:	drivers/rtc/rtc-bd70528.c
 F:	drivers/watchdog/bd70528_wdt.c
 F:	include/linux/mfd/rohm-bd70528.h
+F:	include/linux/mfd/rohm-bd71815.h
 F:	include/linux/mfd/rohm-bd71828.h
 F:	include/linux/mfd/rohm-bd718x7.h
 F:	include/linux/mfd/rohm-generic.h