arm: rmobile: Add supoprt for KMC KZM-A9-GT board

The KZM-A9-GT board has Renesas R-Mobile SH73A0, 512MB DDR2-SDRAM,
USB, Ethernet, and more.

This patch supports the following functions:
	- 512MB DDR2-SDRAM
	- 16MB NOR Flash memory
	- Serial console (SCIF)
	- Ethernet (SMSC)
	- I2C

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index aa54fe1..7c925d4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -990,6 +990,10 @@
 
 	SMDK6400	ARM1176 (S3C6400 SoC)
 
+Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+
+	kzm9g	SH73A0 (RMOBILE SoC)
+
 -------------------------------------------------------------------------
 
 Unknown / orphaned boards: