Bitfields for OpenHCI "HcInterruptStatus" register:
Bit(s)	Description	)
 31	reserved (0)
 30	OC	ownership change
 29-7	reserved
 6	RHSC	Root Hub status changed
 5	FNO	frame number overflowed
 4	UE	unrecoverable error
 3	RD	resume detected
 2	SF	start of frame
 1	WDH	writeback done
 0	SO	scheduling overrun
Note:	writing a 1 bit clears the corresponding bit of the register
SeeAlso: #00902,#00903,#00905,#00907