Bitfields for Intel 82378/82379 PCI Arbiter Priority Control:
Bit(s)	Description	)
 7	bank 3 rotate control
 6	bank 2 rotate control
 5	bank 1 rotate control
 4	bank 0 rotate control
 3	bank 2 fixed priority mode select B
 2	bank 2 fixed priority mode select A
 1	bank 1 fixed priority mode select
 0	bank 0 fixed priority mode select
Note:	if both 'rotate' and 'fixed' bits are set for a given bank,
	  that bank will be in rotating-priority mode
SeeAlso: #01064,#01066