[ARM] Remove asm/hardware.h, use asm/arch/hardware.h instead

Remove includes of asm/hardware.h in addition to asm/arch/hardware.h.
Then, since asm/hardware.h only exists to include asm/arch/hardware.h,
update everything to directly include asm/arch/hardware.h and remove
asm/hardware.h.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-ixp23xx/pci.c b/arch/arm/mach-ixp23xx/pci.c
index db24c43..c84cc6b 100644
--- a/arch/arm/mach-ixp23xx/pci.c
+++ b/arch/arm/mach-ixp23xx/pci.c
@@ -31,7 +31,7 @@
 #include <asm/sizes.h>
 #include <asm/system.h>
 #include <asm/mach/pci.h>
-#include <asm/hardware.h>
+#include <asm/arch/hardware.h>
 
 extern int (*external_fault) (unsigned long, struct pt_regs *);