[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/include/asm-arm/arch-netx/system.h b/include/asm-arm/arch-netx/system.h
index 52adf36..0624d87 100644
--- a/include/asm-arm/arch-netx/system.h
+++ b/include/asm-arm/arch-netx/system.h
@@ -20,7 +20,7 @@
 #define __ASM_ARCH_SYSTEM_H
 
 #include <asm/io.h>
-#include <asm/hardware.h>
+#include <asm/arch/hardware.h>
 #include "netx-regs.h"
 
 static inline void arch_idle(void)