rem: dprintf("boot drive ID: %x\n", gBootDriveID);
add: TRACE(("boot drive ID: %x\n", gBootDriveID));
context: platform_get_boot_device(struct stage2_args *args, Node **_device){	dprintf("boot drive ID: %x\n", gBootDriveID);	BIOSDrive *drive = new BIOSDrive(gBootDriveID);	if (drive->InitCheck() != B_OK) {		dprintf("no boot drive!\n");		return B_ERROR;	}	dprintf("drive size: %Ld bytes\n", drive->Size());	*_device = drive;	return B_OK;}