M68k I/O updates from Kars de Jong and Jochen Friedrich:
  - To be able to use the generic 8250 driver on the HP300, added dummy
    implementations of inb(), inb_p(), outb() and outb_p()
  - Added implementations of readb(), writeb(), readl(), and writel() for the
    8250 driver
Signed-off-by: Kars de Jong <jongk@linux-m68k.org>
Signed-Off-By: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>