gpio: MAINTAINERS: Add an entry for the ATH79 GPIO driver

Add an entry for the ATH79 GPIO driver with myself as maintainer.
Signed-off-by: Alban Bedel <albeu@free.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

MAINTAINERS

@@ -1779,6 +1779,14 @@ S:	Supported
 F:	Documentation/aoe/
 F:	drivers/block/aoe/
 
+ATHEROS 71XX/9XXX GPIO DRIVER
+M:	Alban Bedel <albeu@free.fr>
+W:	https://github.com/AlbanBedel/linux
+T:	git git://github.com/AlbanBedel/linux
+S:	Maintained
+F:	drivers/gpio/gpio-ath79.c
+F:	Documentation/devicetree/bindings/gpio/gpio-ath79.txt
+
 ATHEROS ATH GENERIC UTILITIES
 M:	"Luis R. Rodriguez" <mcgrof@do-not-panic.com>
 L:	linux-wireless@vger.kernel.org