ARM: mxc: iomux-v1: Fix build warning

Fix the following warning:

CC      arch/arm/plat-mxc/iomux-v1.o
arch/arm/plat-mxc/iomux-v1.c: In function 'mxc_gpio_setup_multiple_pins':
arch/arm/plat-mxc/iomux-v1.c:160: warning: 'ret' may be used uninitialized in this function
arch/arm/plat-mxc/iomux-v1.c:160: note: 'ret' was declared here
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/plat-mxc/iomux-v1.c

@@ -157,7 +157,7 @@ EXPORT_SYMBOL(mxc_gpio_mode);
 static int imx_iomuxv1_setup_multiple(const int *list, unsigned count)
 {
 	size_t i;
-	int ret;
+	int ret = 0;
 
 	for (i = 0; i < count; ++i) {
 		ret = mxc_gpio_mode(list[i]);