AT91: change includes from asm/arch/io.h to asm/io.h

and remove the now unused asm/arch-at91/io.h

Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>
diff --git a/arch/arm/cpu/arm926ejs/at91/reset.c b/arch/arm/cpu/arm926ejs/at91/reset.c
index 1f918b0..023719a 100644
--- a/arch/arm/cpu/arm926ejs/at91/reset.c
+++ b/arch/arm/cpu/arm926ejs/at91/reset.c
@@ -23,9 +23,9 @@
  */
 
 #include <common.h>
+#include <asm/io.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/at91_rstc.h>
-#include <asm/arch/io.h>
 
 /* Reset the cpu by telling the reset controller to do so */
 void reset_cpu(ulong ignored)