src: Remove unused 'include <arch/cpu.h>'

Change-Id: Iaa236f07aed52ccb8c4839047894a14a9446a109
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36080
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/soc/intel/quark/memmap.c

@@ -13,7 +13,6 @@
  * GNU General Public License for more details.
  */
 
-#include <arch/cpu.h>
 #include <arch/romstage.h>
 #include <cbmem.h>
 #include <soc/reg_access.h>