asm-x86/monitor: Fix monitor capability reporting on SVM systems

asm-x86/monitor: Fix monitor capability reporting on SVM systems

No monitor features are available on AMD and all
capabilities are passed only to the Intel processor architecture.
This means that the arch_monitor_get_capabilities returns
capabilities = 0.

This patch is separating out features which are implemented on both
systems from those implemented only on Intel, so that we advertize the
working capabilities on AMD.

Signed-off-by: Alexandru Isaila <aisaila@bitdefender.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Acked-by: Razvan Cojocaru <rcojocaru@bitdefender.com>