[ARM] pxa: move GPIO register definitions into <mach/gpio.h>

This makes gpio.c fully independent of pxa-regs.h (except for the
virtual address of the registers).

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
diff --git a/arch/arm/mach-pxa/mfp-pxa2xx.c b/arch/arm/mach-pxa/mfp-pxa2xx.c
index 33626de..9d23b73 100644
--- a/arch/arm/mach-pxa/mfp-pxa2xx.c
+++ b/arch/arm/mach-pxa/mfp-pxa2xx.c
@@ -18,8 +18,7 @@
 #include <linux/init.h>
 #include <linux/sysdev.h>
 
-#include <mach/hardware.h>
-#include <mach/pxa-regs.h>
+#include <mach/gpio.h>
 #include <mach/pxa2xx-regs.h>
 #include <mach/mfp-pxa2xx.h>