1. Add a new library class (RegisterFilterLib) to filter
and trace port IO/MMIO/MSR access.
2. Add a NULL instance (RegisterFilterLibNull) can be used
to keep current behavior.
Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Signed-off-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Abner Chang <abner.chang@hpe.com>