[ARM] pxa: avoid polluting the kernel's namespace

Avoid unnecessarily pollution of the kernel's namespace by avoiding
mach/hardware.h.  Include this header file where necessary.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/ezx.c b/arch/arm/mach-pxa/ezx.c
index cc3d850..83c56d3 100644
--- a/arch/arm/mach-pxa/ezx.c
+++ b/arch/arm/mach-pxa/ezx.c
@@ -21,6 +21,7 @@
 #include <mach/pxafb.h>
 #include <mach/ohci.h>
 #include <mach/i2c.h>
+#include <mach/hardware.h>
 
 #include <mach/mfp-pxa27x.h>
 #include <mach/pxa-regs.h>