INT 15 - APM SL Enhanced v1.0 - GET GLOBAL STANDBY TIMER

	AX = 5380h
	BH = 02h
Return: CF clear if successful
	SI:DI = timer count in seconds (actually 1.024 seconds)
Desc:	reads the value of 82360SL GSTDBY_TMRH & GSTDBY_TMRL registers
SeeAlso: AX=5380h/BH=00h,AX=5380h/BH=03h,AX=5380h/BH=04h,AX=5380h/BH=7Fh