ARM: imx/gpio: remove some useless casts

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c
index 9c3e362..a43d9cc 100644
--- a/arch/arm/plat-mxc/gpio.c
+++ b/arch/arm/plat-mxc/gpio.c
@@ -175,7 +175,7 @@
 static void mx3_gpio_irq_handler(u32 irq, struct irq_desc *desc)
 {
 	u32 irq_stat;
-	struct mxc_gpio_port *port = (struct mxc_gpio_port *)get_irq_data(irq);
+	struct mxc_gpio_port *port = get_irq_data(irq);
 
 	irq_stat = __raw_readl(port->base + GPIO_ISR) &
 			__raw_readl(port->base + GPIO_IMR);
@@ -188,7 +188,7 @@
 {
 	int i;
 	u32 irq_msk, irq_stat;
-	struct mxc_gpio_port *port = (struct mxc_gpio_port *)get_irq_data(irq);
+	struct mxc_gpio_port *port = get_irq_data(irq);
 
 	/* walk through all interrupt status registers */
 	for (i = 0; i < gpio_table_size; i++) {