void * framebuffer,
ULONG depth );
This function dumps a boot picture into the specified framebuffer.
The Gfx susbsytem opens cgxbootpic.library if it is
available, and when displays are created, calls this
function with the displays framebuffer as input to render
the selected bootpic.
This implementation is bugged - need to check what the real library
on m68k expects as params and correct this code appropriately.