Rollback the change 15178. 
And, update NameString IScsiDxeStrings[] to IScsi4DxeStrings[] to match its BASE_NAME

Signed-off-by: Gao, Liming <liming.gao@intel.com>


git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/MdeModulePkg@15186 6f19259b-4bc3-4df7-8a09-765794883524