value slipped in from a debugging session.
Add AHC_LSCBS_ENABLED and AHC_SCB_CONFIG_USED ahc_flags which
allow for some code to move to the core.
Remove extern for ahc_syncrates[]. The OSMs no longer need
direct access to this array.
Add serial eeprom field to the ahc softc.
Prototype ahc_search_untagged_queues() and ahc_print_register().
Convert to AHC_SHOW_XXX debug option format.