ARM: imx: get rid of mxc_gpio_init

This function is defined once for each imx family and so is in the way
when compiling a kernel for more than one SoC.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/mach-mx5/mm.c b/arch/arm/mach-mx5/mm.c
index b7677ef..2f79722 100644
--- a/arch/arm/mach-mx5/mm.c
+++ b/arch/arm/mach-mx5/mm.c
@@ -65,6 +65,8 @@
 	iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
 }
 
+int imx51_register_gpios(void);
+
 void __init mx51_init_irq(void)
 {
 	unsigned long tzic_addr;
@@ -79,5 +81,6 @@
 	if (!tzic_virt)
 		panic("unable to map TZIC interrupt controller\n");
 
+	imx51_register_gpios();
 	tzic_init_irq(tzic_virt);
 }