arm: marvell: Move arch/kirkwood.h to arch/soc.h

This move makes is possible to use this header not only from kirkwood
platforms but from all Marvell mvebu platforms.

Signed-off-by: Stefan Roese <sr@denx.de>
Tested-by: Luka Perkov <luka@openwrt.org>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
diff --git a/drivers/i2c/mvtwsi.c b/drivers/i2c/mvtwsi.c
index ab3ffa0..a2deae6 100644
--- a/drivers/i2c/mvtwsi.c
+++ b/drivers/i2c/mvtwsi.c
@@ -21,7 +21,7 @@
 #if defined(CONFIG_ORION5X)
 #include <asm/arch/orion5x.h>
 #elif defined(CONFIG_KIRKWOOD)
-#include <asm/arch/kirkwood.h>
+#include <asm/arch/soc.h>
 #elif defined(CONFIG_SUNXI)
 #include <asm/arch/i2c.h>
 #else