arch/x86/cpu_common.c: Remove unneeded headers

Change-Id: I4f57376138725804133059c785e89e095fd6a759
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26000
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed