[ARM] pxa: remove unnecessary #include of pxa-regs.h and hardware.h

pxa-regs.h and hardware.h are not intended for use directly in driver
code, remove those unnecessary references.

Signed-off-by: Eric Miao <eric.miao@marvell.com>

arch/arm/mach-pxa/cm-x2xx-pci.c

@@ -22,7 +22,6 @@
 #include <linux/gpio.h>
 
 #include <asm/mach/pci.h>
-#include <mach/pxa-regs.h>
 #include <asm/mach-types.h>
 
 #include <asm/hardware/it8152.h>