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-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index e31a881..f2c2897 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -344,7 +344,8 @@
 }
 
 static struct pxa_gpio_platform_data pxa25x_gpio_info __initdata = {
-	.gpio_set_wake = gpio_set_wake,
+	.irq_base	= PXA_GPIO_TO_IRQ(0),
+	.gpio_set_wake	= gpio_set_wake,
 };
 
 static struct platform_device *pxa25x_devices[] __initdata = {