zorro8390: Update style, neaten, restructure to eliminate prototypes

Convert to current logging styles.
Move code blocks to eliminate need for prototypes.
Use tabs for code indent and standardize spacing.
Comment neatening.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>