ARM: io: remove IO_SPACE_LIMIT from platforms without PCI/ISA

Nothing should be using PCI/ISA IO on these platforms, so their
IO_SPACE_LIMIT definitions are irrelevent.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-vexpress/include/mach/io.h

@@ -20,8 +20,6 @@
 #ifndef __ASM_ARM_ARCH_IO_H
 #define __ASM_ARM_ARCH_IO_H
 
-#define IO_SPACE_LIMIT 0xffffffff
-
 #define __io(a)		__typesafe_io(a)
 #define __mem_pci(a)	(a)