FIXME: I know that this is not the place to add these definitions
    they should be added/fixed in the .wb files.

FIXME:
- fixed #ifndef statement, the dash makes the compiler ignore the MDIO_WB
  part, which does not allow the file to be #included together with the
  endpoint-regs.h file. This should be done in the .wb file.

FIXME:
- added register address constants. This should be done in the .wb file

Note: I have no idea how to do this, someone who knows could probably fix
    the issues raised here.