pci_iomap/unmap

fork remove code for pci -- move it to separate, new, function and don't care
about pci in the former.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Zü´z‘#x