Bitfields for Intel 82371MX Clock Control register:
Bit(s)	Description	)
 7	Clock Throttle standy by timer frequency
	=1 32ms
	=0 4ms
Note:	Sets the granularity of the Clock Throttle Standby Timer
 6-5	reserved
 4	Enable Auto Clock Throttle
 3-2	STPCLK# Mode
	00 Disable STPCLK# Function
	01 Enable stop grant mode
	10 Enable stop clock mode
	11 reserved
 1	Enable clock throttling
 0	Enable "PCI Clock can be stopped"
SeeAlso: #01168,PORT xxxxh"Intel 82371"