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

Also, replace 'lapic.h' by 'lapic_def.h' in 'soc/intel/braswell/northcluster.c'.

Change-Id: I71cff43d53660dc1e5a760ac3034bcf75f93c6e7
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41489
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/cpu/amd/smm/smm_init.c

@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <cpu/x86/lapic.h>
 #include <cpu/x86/msr.h>
 #include <cpu/x86/mtrr.h>
 #include <cpu/amd/mtrr.h>