{drivers,northbridge,security}: Remove unused <cpu/x86/lapic.h>

Found using:
diff <(git grep -l '#include <cpu/x86/lapic.h>' -- src/) <(git grep -l 'xapic_read\|xapic_write\|xapic_send_ipi\|xapic_busy\|x2apic_read\|x2apic_write\|x2apic_send_ipi\|is_x2apic_mode\|lapic_read\|lapic_write\|lapic_update32\|lapic_send_ipi\|lapic_busy\|initial_lapicid\|lapicid\|stop_this_cpu\|enable_lapic\|disable_lapic\|setup_lapic' -- src/) |grep ">"

Change-Id: Ie8fcf61a0604281c23cd3f589f1aa0cdbbd9366b
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61048
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <martinroth@google.com>

src/northbridge/amd/pi/00730F01/northbridge.c

@@ -17,7 +17,6 @@
 #include <Porting.h>
 #include <AGESA.h>
 #include <Topology.h>
-#include <cpu/x86/lapic.h>
 #include <cpu/amd/msr.h>
 #include <cpu/amd/mtrr.h>
 #include <acpi/acpigen.h>