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/brownstone.c b/arch/arm/mach-mmp/brownstone.c
index 2358011..ac25544 100644
--- a/arch/arm/mach-mmp/brownstone.c
+++ b/arch/arm/mach-mmp/brownstone.c
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
+#include <linux/gpio-pxa.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/max8649.h>
 #include <linux/regulator/fixed.h>
@@ -104,6 +105,10 @@
 	GPIO89_GPIO,
 };
 
+static struct pxa_gpio_platform_data mmp2_gpio_pdata = {
+	.irq_base	= MMP_GPIO_TO_IRQ(0),
+};
+
 static struct regulator_consumer_supply max8649_supply[] = {
 	REGULATOR_SUPPLY("vcc_core", NULL),
 };
@@ -202,6 +207,8 @@
 	/* on-chip devices */
 	mmp2_add_uart(1);
 	mmp2_add_uart(3);
+	platform_device_add_data(&mmp2_device_gpio, &mmp2_gpio_pdata,
+				 sizeof(struct pxa_gpio_platform_data));
 	platform_device_register(&mmp2_device_gpio);
 	mmp2_add_twsi(1, NULL, ARRAY_AND_SIZE(brownstone_twsi1_info));
 	mmp2_add_sdhost(0, &mmp2_sdh_platdata_mmc0); /* SD/MMC */