Fix a warning issue under CYGWIN_GCC building:  A function cannot be declared as returning a data object having a volatile or const type, but it can return a pointer to a volatile or const object.
Fix a warning issue under CYGWIN_GCC building: 
A function cannot be declared as returning a data object having a volatile or const type, but it can return a pointer to a volatile or const object.

git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@1121 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2