MdeModulePkg Pcd(DXE): Use correct TokenNumber to call GetPtrTypeSize () when SKU ID enabled.

In GetLocalTokenNumber () of Service.c(DXE), the TokenNumber is wrong to call GetPtrTypeSize ().
GetPtrTypeSize need the original TokenNumber.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Bob C Feng <bob.c.feng@intel.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/MdeModulePkg@14936 6f19259b-4bc3-4df7-8a09-765794883524