This adds support for the iomap interface to sh64.  As a result of this, we
can also clean up a lot of the sh64 common I/O routines.

We also add a board-specific ioport_map() for the cayman
so we can use iomap generically.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>