ShellPkg/UefiShellDebug1CommandsLib

With Itanium architecture unsupported, gEfiSalSystemTableGuid
and gEfiMpsTableGuid will be no longer used.
https://bugzilla.tianocore.org/show_bug.cgi?id=1560

v2:Withdraw the removal of #include <Guid/Mps.h> and
   gEfiMpsTableGuid.

Cc: Jaben Carsey <jaben.carsey@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>