arch/io.h: Drop unnecessary include

Change-Id: I91158452680586ac676ea11c8589062880a31f91
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/31692
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/intel/fsp2_0/memory_init.c

@@ -12,7 +12,6 @@
  */
 
 #include <security/vboot/antirollback.h>
-#include <arch/io.h>
 #include <arch/symbols.h>
 #include <assert.h>
 #include <cbfs.h>

src/drivers/intel/fsp2_0/temp_ram_exit.c

@@ -9,7 +9,6 @@
  * (at your option) any later version.
  */
 
-#include <arch/io.h>
 #include <arch/cpu.h>
 #include <console/console.h>
 #include <fsp/api.h>