infoType - The type of information requested. Valid types are:
BL_Video (struct VesaInfo*) - VESA video mode data
BL_LoaderName (STRPTR) - Name of bootloader
BL_Args (struct List *) - Kernel arguments. Data item is struct Node.
ln_Name points to argument text.
BL_Drives (struct List *) - Legacy disk drives present in the system.
Data item is struct DriveInfoNode.