Prototypes annotated the same way they are on other platforms.  I'm not
too fond of readb() taking const volatile void * (sic), but AFAICS
that's the only way to tell cc(1) that both volatile and const pointers
are acceptable here ;-/

memcpy_toio/memcpy_fromio/memset_io made void - same as they are
elsewhere.  And no, nobody had been insane enough to use the return
values...
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>