ARM: pxa: move PXA_GPIO_TO_IRQ macro

Since PXA_GPIO_TO_IRQ() & MMP_GPIO_TO_IRQ() macro are depended on
arch code, move them from gpio driver to platform driver instead.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/arm/mach-mmp/tavorevb.c b/arch/arm/mach-mmp/tavorevb.c
index 4c127d2..cdfc9bf 100644
--- a/arch/arm/mach-mmp/tavorevb.c
+++ b/arch/arm/mach-mmp/tavorevb.c
@@ -8,6 +8,7 @@
  *  publishhed by the Free Software Foundation.
  */
 #include <linux/gpio.h>
+#include <linux/gpio-pxa.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
@@ -60,6 +61,10 @@
 	DF_RDY0_DF_RDY0,
 };
 
+static struct pxa_gpio_platform_data pxa910_gpio_pdata = {
+	.irq_base	= MMP_GPIO_TO_IRQ(0),
+};
+
 static struct smc91x_platdata tavorevb_smc91x_info = {
 	.flags	= SMC91X_USE_16BIT | SMC91X_NOWAIT,
 };
@@ -93,6 +98,8 @@
 
 	/* on-chip devices */
 	pxa910_add_uart(1);
+	platform_device_add_data(&pxa910_device_gpio, &pxa910_gpio_pdata,
+				 sizeof(struct pxa_gpio_platform_data));
 	platform_device_register(&pxa910_device_gpio);
 
 	/* off-chip devices */