arm/mxc: do not use gpio_to_irq() for static initializers

The patch defines IMX_GPIO_TO_IRQ() in mach/hardware.h and replaces
all the uses of gpio_to_irq() in static initializers with
IMX_GPIO_TO_IRQ().

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx5/board-cpuimx51sd.c b/arch/arm/mach-mx5/board-cpuimx51sd.c
index ff096d5..8badbdb 100644
--- a/arch/arm/mach-mx5/board-cpuimx51sd.c
+++ b/arch/arm/mach-mx5/board-cpuimx51sd.c
@@ -129,7 +129,7 @@
 		I2C_BOARD_INFO("tsc2007", 0x49),
 		.type		= "tsc2007",
 		.platform_data	= &tsc2007_info,
-		.irq		= gpio_to_irq(TSC2007_IRQGPIO),
+		.irq		= IMX_GPIO_TO_IRQ(TSC2007_IRQGPIO),
 	},
 };
 
@@ -245,7 +245,7 @@
 		.mode		= SPI_MODE_0,
 		.chip_select     = 0,
 		.platform_data   = &mcp251x_info,
-		.irq             = gpio_to_irq(CAN_IRQGPIO)
+		.irq             = IMX_GPIO_TO_IRQ(CAN_IRQGPIO)
 	},
 };