MAINTAINERS: Add entry for Renesas arm64 architecture

Initial Renesas arm64 architecture support will be for the R-Car H3,
r8a7795, SoC and its Salvator-X board.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>

MAINTAINERS

@@ -1420,6 +1420,15 @@ M:	Lennert Buytenhek <kernel@wantstofly.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 
+ARM/RENESAS ARM64 ARCHITECTURE
+M:	Simon Horman <horms@verge.net.au>
+M:	Magnus Damm <magnus.damm@gmail.com>
+L:	linux-sh@vger.kernel.org
+Q:	http://patchwork.kernel.org/project/linux-sh/list/
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas.git next
+S:	Supported
+F:	arch/arm64/boot/dts/renesas/
+
 ARM/RISCPC ARCHITECTURE
 M:	Russell King <linux@arm.linux.org.uk>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)