[U-Boot-Users] Unused 750FX_HID defines?

Hello U-Boot users,

In some board's configuration files I've found some defines which are not used in any source file. Can anyone explain what they are for?

#define CFG_750FX_HID0 #define CFG_750FX_HID1 #define CFG_750FX_HID2

Thanks, Roel