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/led.c b/arch/arm/cpu/arm926ejs/at91/led.c
index 0a315c4..6bcfa7f 100644
--- a/arch/arm/cpu/arm926ejs/at91/led.c
+++ b/arch/arm/cpu/arm926ejs/at91/led.c
@@ -23,10 +23,10 @@
  */
 
 #include <common.h>
+#include <asm/io.h>
 #include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_pio.h>
 #include <asm/arch/gpio.h>
-#include <asm/arch/io.h>
 
 #ifdef CONFIG_RED_LED
 void red_LED_on(void)