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-imx/mach-mx35_3ds.c b/arch/arm/mach-imx/mach-mx35_3ds.c
index 882880a..c10221d 100644
--- a/arch/arm/mach-imx/mach-mx35_3ds.c
+++ b/arch/arm/mach-imx/mach-mx35_3ds.c
@@ -43,7 +43,7 @@
 
 #include "devices-imx35.h"
 
-#define EXPIO_PARENT_INT	(MXC_INTERNAL_IRQS + GPIO_PORTA + 1)
+#define EXPIO_PARENT_INT	gpio_to_irq(IMX_GPIO_NR(1, 1))
 
 static const struct imxuart_platform_data uart_pdata __initconst = {
 	.flags = IMXUART_HAVE_RTSCTS,