[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-imx/dma.c b/arch/arm/mach-imx/dma.c
index ee1c6f0..17a43ba 100644
--- a/arch/arm/mach-imx/dma.c
+++ b/arch/arm/mach-imx/dma.c
@@ -30,7 +30,7 @@
 
 #include <asm/system.h>
 #include <asm/irq.h>
-#include <asm/hardware.h>
+#include <asm/arch/hardware.h>
 #include <asm/dma.h>
 #include <asm/arch/imx-dma.h>