ARM: kirkwood: add mvsdio driver

This patch add Marvell kirkwood MVSDIO/MMC driver
and enable it for Sheevaplugs and OpenRD boards.

Signed-off-by: Gerald Kerma <drEagle@doukki.net>
Reviewed-by: Stefan Roese <sr@denx.de>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
diff --git a/arch/arm/include/asm/arch-kirkwood/kirkwood.h b/arch/arm/include/asm/arch-kirkwood/kirkwood.h
index bc207f5..3ea51d7 100644
--- a/arch/arm/include/asm/arch-kirkwood/kirkwood.h
+++ b/arch/arm/include/asm/arch-kirkwood/kirkwood.h
@@ -39,6 +39,7 @@
 #define KW_EGIGA0_BASE			(KW_REGISTER(0x72000))
 #define KW_EGIGA1_BASE			(KW_REGISTER(0x76000))
 #define KW_SATA_BASE			(KW_REGISTER(0x80000))
+#define KW_SDIO_BASE			(KW_REGISTER(0x90000))
 
 /* Kirkwood Sata controller has two ports */
 #define KW_SATA_PORT0_OFFSET		0x2000