Change RETURN_STATUS type to UINTN, thus EFI_STATUS is defined as UINTN to align with recent UEFI 2.3 spec update.
Change RETURN_STATUS type to UINTN, thus EFI_STATUS is defined as UINTN to align with recent UEFI 2.3 spec update.

Impaction:
There should be no impact unless code has been written that tests a constant or variable of type EFI_STATUS to be less than 0, or tested it against a negative value. This most likely have not been done.

git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@9324 6f19259b-4bc3-4df7-8a09-765794883524

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