MAINTAINERS: Add Realtek section

Add myself as maintainer.
Signed-off-by: Andreas Färber <afaerber@suse.de>

MAINTAINERS

@@ -1678,6 +1678,13 @@ M:	Lennert Buytenhek <kernel@wantstofly.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 
+ARM/REALTEK ARCHITECTURE
+M:	Andreas Färber <afaerber@suse.de>
+L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S:	Maintained
+F:	arch/arm64/boot/dts/realtek/
+F:	Documentation/devicetree/bindings/arm/realtek.txt
+
 ARM/RENESAS ARM64 ARCHITECTURE
 M:	Simon Horman <horms@verge.net.au>
 M:	Magnus Damm <magnus.damm@gmail.com>