arch/cpu: Rename mp_get_apic_id() and add_cpu_map_entry() function

This patch renames mp_get_apic_id() to cpu_get_apic_id() and
add_cpu_map_entry() to cpu_add_map_entry() in order access it
outside CONFIG_PARALLEL_MP kconfig scope.

Also make below changes
- Make cpu_add_map_entry() function available externally to call
it from mp_init.c and lapic_cpu_init.c.

BRANCH=none
BUG=b:79562868

Change-Id: I6a6c85df055bc0b5fc8c850cfa04d50859067088
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32701
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/include/cpu/cpu.h

@@ -5,6 +5,10 @@
 
 #if !defined(__ROMCC__)
 void cpu_initialize(unsigned int cpu_index);
+/* Returns default APIC id based on logical_cpu number or < 0 on failure. */
+int cpu_get_apic_id(int logical_cpu);
+/* Function to keep track of cpu default apic_id */
+void cpu_add_map_entry(unsigned int index);
 struct bus;
 void initialize_cpus(struct bus *cpu_bus);
 asmlinkage void secondary_cpu_init(unsigned int cpu_index);