MdeModulePkg/SmmLockBoxLib: Use 'DEBUG_' prefix instead of 'EFI_D_'

MdeModulePkg/SmmLockBoxLib: Use 'DEBUG_' prefix instead of 'EFI_D_'

This commit is out of the scope for BZ-1409. It is a coding style
refinement for the SmmLockBoxLib.

More specifically, the commit will remove all the debug message display
level macros starting with 'EFI_D_' and replace them with macros starting
with 'DEBUG_'.

Cc: Jian J Wang <jian.j.wang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>