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/gplugd.c b/arch/arm/mach-mmp/gplugd.c
index f62b68d..d81b247 100644
--- a/arch/arm/mach-mmp/gplugd.c
+++ b/arch/arm/mach-mmp/gplugd.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
+#include <linux/gpio-pxa.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
@@ -128,6 +129,10 @@
 	GPIO116_I2S_TXD
 };
 
+static struct pxa_gpio_platform_data pxa168_gpio_pdata = {
+	.irq_base	= MMP_GPIO_TO_IRQ(0),
+};
+
 static struct i2c_board_info gplugd_i2c_board_info[] = {
 	{
 		.type = "isl1208",
@@ -186,6 +191,8 @@
 	pxa168_add_uart(3);
 	pxa168_add_ssp(1);
 	pxa168_add_twsi(0, NULL, ARRAY_AND_SIZE(gplugd_i2c_board_info));
+	platform_device_add_data(&pxa168_device_gpio, &pxa168_gpio_pdata,
+				 sizeof(struct pxa_gpio_platform_data));
 	platform_device_register(&pxa168_device_gpio);
 
 	pxa168_add_eth(&gplugd_eth_platform_data);