arm: at91 move board.h to arch/arm/mach-at91

as this is only used board old style board

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/mach-at91/board-eco920.c b/arch/arm/mach-at91/board-eco920.c
index d93658a..771e58b 100644
--- a/arch/arm/mach-at91/board-eco920.c
+++ b/arch/arm/mach-at91/board-eco920.c
@@ -24,12 +24,12 @@
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 
-#include <mach/board.h>
 #include <mach/at91_aic.h>
 #include <mach/at91rm9200_mc.h>
 #include <mach/at91_ramc.h>
 #include <mach/cpu.h>
 
+#include "board.h"
 #include "generic.h"
 
 static void __init eco920_init_early(void)