ARM i.MX: get rid of wrong MXC_INTERNAL_IRQ usage

There are several occurences where MXC_INTERNAL_IRQ is
assumed to be the start of the gpio interrupts. It was never
meant this way. Replace these with gpio_to_irq.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Fabio Estevam <fabio.estevam@freescale.com>
diff --git a/arch/arm/mach-mx5/board-cpuimx51.c b/arch/arm/mach-mx5/board-cpuimx51.c
index 4efa02e..7fbfd06 100644
--- a/arch/arm/mach-mx5/board-cpuimx51.c
+++ b/arch/arm/mach-mx5/board-cpuimx51.c
@@ -43,10 +43,6 @@
 #define CPUIMX51_QUARTB_GPIO	IMX_GPIO_NR(3, 25)
 #define CPUIMX51_QUARTC_GPIO	IMX_GPIO_NR(3, 26)
 #define CPUIMX51_QUARTD_GPIO	IMX_GPIO_NR(3, 27)
-#define CPUIMX51_QUARTA_IRQ	(MXC_INTERNAL_IRQS + CPUIMX51_QUARTA_GPIO)
-#define CPUIMX51_QUARTB_IRQ	(MXC_INTERNAL_IRQS + CPUIMX51_QUARTB_GPIO)
-#define CPUIMX51_QUARTC_IRQ	(MXC_INTERNAL_IRQS + CPUIMX51_QUARTC_GPIO)
-#define CPUIMX51_QUARTD_IRQ	(MXC_INTERNAL_IRQS + CPUIMX51_QUARTD_GPIO)
 #define CPUIMX51_QUART_XTAL	14745600
 #define CPUIMX51_QUART_REGSHIFT	17
 
@@ -61,7 +57,7 @@
 static struct plat_serial8250_port serial_platform_data[] = {
 	{
 		.mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x400000),
-		.irq = CPUIMX51_QUARTA_IRQ,
+		.irq = gpio_to_irq(CPUIMX51_QUARTA_GPIO),
 		.irqflags = IRQF_TRIGGER_HIGH,
 		.uartclk = CPUIMX51_QUART_XTAL,
 		.regshift = CPUIMX51_QUART_REGSHIFT,
@@ -69,7 +65,7 @@
 		.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
 	}, {
 		.mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x800000),
-		.irq = CPUIMX51_QUARTB_IRQ,
+		.irq = gpio_to_irq(CPUIMX51_QUARTB_GPIO),
 		.irqflags = IRQF_TRIGGER_HIGH,
 		.uartclk = CPUIMX51_QUART_XTAL,
 		.regshift = CPUIMX51_QUART_REGSHIFT,
@@ -77,7 +73,7 @@
 		.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
 	}, {
 		.mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x1000000),
-		.irq = CPUIMX51_QUARTC_IRQ,
+		.irq = gpio_to_irq(CPUIMX51_QUARTC_GPIO),
 		.irqflags = IRQF_TRIGGER_HIGH,
 		.uartclk = CPUIMX51_QUART_XTAL,
 		.regshift = CPUIMX51_QUART_REGSHIFT,
@@ -85,7 +81,7 @@
 		.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
 	}, {
 		.mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x2000000),
-		.irq = CPUIMX51_QUARTD_IRQ,
+		.irq = irq_to_gpio(CPUIMX51_QUARTD_GPIO),
 		.irqflags = IRQF_TRIGGER_HIGH,
 		.uartclk = CPUIMX51_QUART_XTAL,
 		.regshift = CPUIMX51_QUART_REGSHIFT,