[ARM] Remove asm/hardware.h include from SA1100 io.h

Unfortunately, we have a symbol clash between the SA-1100 header and
some drivers. Since everywhere which needs SA1100 specifics includes
asm/hardware.h, we don't need to include it in the SA1100 io.h header.

In file included from drivers/net/wireless/wavelan_cs.p.h:459,
from drivers/net/wireless/wavelan_cs.c:60:
drivers/net/wireless/wavelan_cs.h:97:1: warning: "LCSR" redefined
In file included from include/asm/arch/hardware.h:56,
from include/asm/hardware.h:16,
from include/asm/arch/io.h:13,
from include/asm/io.h:71,
from drivers/net/wireless/wavelan_cs.p.h:433,
from drivers/net/wireless/wavelan_cs.c:60:
include/asm/arch/SA-1100.h:1907:1: warning: this is the location of the previous definition

Signed-off-by: Russell King <[e-mail]>

include/asm-arm/arch-sa1100/io.h

···
 #ifndef __ASM_ARM_ARCH_IO_H
 #define __ASM_ARM_ARCH_IO_H
 
-#include <asm/hardware.h>
-
 #define IO_SPACE_LIMIT 0xffffffff
 
 /*