ARM: imx: remove last explicit users of virtual base address defines

This allows changing the mapping without the need to adapt all users.

While at it remove some unneeded casts to void __iomem *, this is already
taken care for in the IO_ADDRESS macros

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/mach-imx/devices.c b/arch/arm/mach-imx/devices.c
index fba5047..e69e46e 100644
--- a/arch/arm/mach-imx/devices.c
+++ b/arch/arm/mach-imx/devices.c
@@ -159,22 +159,22 @@
 static struct mxc_gpio_port imx_gpio_ports[] = {
 	{
 		.chip.label = "gpio-0",
-		.base = (void __iomem *)MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR),
+		.base = MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR),
 		.irq = MX1_GPIO_INT_PORTA,
 		.virtual_irq_start = MXC_GPIO_IRQ_START,
 	}, {
 		.chip.label = "gpio-1",
-		.base = (void __iomem *)MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR + 0x100),
+		.base = MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR + 0x100),
 		.irq = MX1_GPIO_INT_PORTB,
 		.virtual_irq_start = MXC_GPIO_IRQ_START + 32,
 	}, {
 		.chip.label = "gpio-2",
-		.base = (void __iomem *)MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR + 0x200),
+		.base = MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR + 0x200),
 		.irq = MX1_GPIO_INT_PORTC,
 		.virtual_irq_start = MXC_GPIO_IRQ_START + 64,
 	}, {
 		.chip.label = "gpio-3",
-		.base = (void __iomem *)MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR + 0x300),
+		.base = MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR + 0x300),
 		.irq = MX1_GPIO_INT_PORTD,
 		.virtual_irq_start = MXC_GPIO_IRQ_START + 96,
 	}