boot/efi/x86: implement SMP detection and bootup

* move common SMP initialization code to x86/arch_smp.cpp

* factor out arch-specific SMP initialization to
arch_smp_32.cpp resp arch_smp_64.cpp

* implement smp_trampoline for x86 32-bit EFI loader

* rename SMP trampoline for x86_64 to long_smp_trampoline

* add new argument virtKernelArgs to arch_smp_boot_other_cpus
as the kernel args are not identity mapped on 32-bit architectures

Change-Id: I30d0bb1fa9bfb08f6784a2af34eb83d6b64afa57
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4869
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>