[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>

arch/arm/mach-ixp4xx/gtwx5715-pci.c

@@ -28,7 +28,7 @@
 #include <linux/irq.h>
 
 #include <asm/mach-types.h>
-#include <asm/hardware.h>
+#include <asm/arch/hardware.h>
 #include <asm/arch/gtwx5715.h>
 #include <asm/mach/pci.h>