ARM: imx: dynamically allocate imx2-wdt devices

Currently there is no platform data used in the driver.  In case this
changes and for consistency NULL is passed unused to the soc specific
functions.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/mach-imx/mach-cpuimx27.c b/arch/arm/mach-imx/mach-cpuimx27.c
index 9baaf3d..5771d4e5 100644
--- a/arch/arm/mach-imx/mach-cpuimx27.c
+++ b/arch/arm/mach-imx/mach-cpuimx27.c
@@ -157,7 +157,6 @@
 
 static struct platform_device *platform_devices[] __initdata = {
 	&eukrea_cpuimx27_nor_mtd_device,
-	&mxc_wdt,
 };
 
 static const struct imxi2c_platform_data cpuimx27_i2c1_data __initconst = {
@@ -261,6 +260,7 @@
 
 	imx27_add_fec(NULL);
 	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
+	imx27_add_imx2_wdt(NULL);
 	imx27_add_mxc_w1(NULL);
 
 #if defined(CONFIG_MACH_EUKREA_CPUIMX27_USESDHC2)