of_iomap() matched with plan iounmap()

[David Miller]

From: Arnd Bergmann <arnd at arndb.de>
Date: Fri, 19 Aug 2011 14:26:18 +0200

> We could of course change all existing users of of_iounmap on sparc to use
> the simpler prototype, because it also just calls iounmap.

Check again, on sparc64 it needs the resource to release it.

Only the 32-bit version on sparc evaluates to just a plain iounmap().