ARM: footbridge: use fixed PCI i/o mapping

Move footbridge PCI to fixed i/o mapping. io.h is still needed for the
!MMU case.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3dfc555..7215ebf 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -431,7 +431,7 @@
 	select FOOTBRIDGE
 	select GENERIC_CLOCKEVENTS
 	select HAVE_IDE
-	select NEED_MACH_IO_H
+	select NEED_MACH_IO_H if !MMU
 	select NEED_MACH_MEMORY_H
 	help
 	  Support for systems based on the DC21285 companion chip