INT 15 - Intel System Management Bus - REQUEST ABORT

	AX = 53B0h
	BH = 12h
	BL = protocol (see #00487)
	CH = device address
	CL = device command
Return: CF clear if successful
	    AH = 00h (SMBus OK)
	CF set if error
	    AH = error code (05h,13h,15h,16h,86h) (see #00484)
Desc:	stop the currently pending SMBus request; usually used to terminate
	  a request after an SMI Detected error