src: Remove unused 'include <cpu/x86/mtrr.h>'

Change-Id: I3f08b9cc34582165785063580b3356135030f63e
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41782
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: David Guckian

src/drivers/intel/fsp1_1/romstage.c

@@ -7,7 +7,6 @@
 #include <cbmem.h>
 #include <cf9_reset.h>
 #include <cpu/intel/microcode.h>
-#include <cpu/x86/mtrr.h>
 #include <ec/google/chromeec/ec.h>
 #include <ec/google/chromeec/ec_commands.h>
 #include <elog.h>

src/drivers/intel/gma/intel_ddi.c

@@ -8,7 +8,6 @@
 #include <device/pci.h>
 #include <ec/google/chromeec/ec.h>
 #include <cpu/x86/tsc.h>
-#include <cpu/x86/mtrr.h>
 #include <cpu/x86/msr.h>
 #include <edid.h>
 #include <drivers/intel/gma/i915.h>