src: capitalize 'APIC'

Change-Id: I487fb53bb2b011d214f002fc200ade2f128a4cc6
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39030
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/arch/x86/cpu.c

@@ -211,7 +211,7 @@ static void set_cpu_ops(struct device *cpu)
 	cpu->ops = driver ? driver->ops : NULL;
 }
 
-/* Keep track of default apic ids for SMM. */
+/* Keep track of default APIC ids for SMM. */
 static int cpus_default_apic_id[CONFIG_MAX_CPUS];
 
 /*