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/arch/arm/mvebu-common/timer.c b/arch/arm/mvebu-common/timer.c
index a08f4a1..b7aa645 100644
--- a/arch/arm/mvebu-common/timer.c
+++ b/arch/arm/mvebu-common/timer.c
@@ -7,7 +7,7 @@
 
 #include <common.h>
 #include <asm/io.h>
-#include <asm/arch/kirkwood.h>
+#include <asm/arch/soc.h>
 
 #define UBOOT_CNTR	0	/* counter to use for uboot timer */