ARM: imx: dynamically allocate mxc_w1 devices

Currently there is no platform data used in the driver.  In case this
changes 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/devices-imx27.h b/arch/arm/mach-imx/devices-imx27.h
index 7011690..b957e78 100644
--- a/arch/arm/mach-imx/devices-imx27.h
+++ b/arch/arm/mach-imx/devices-imx27.h
@@ -35,6 +35,10 @@
 #define imx27_add_mxc_nand(pdata)	\
 	imx_add_mxc_nand(&imx27_mxc_nand_data, pdata)
 
+extern const struct imx_mxc_w1_data imx27_mxc_w1_data __initconst;
+#define imx27_add_mxc_w1(pdata)	\
+	imx_add_mxc_w1(&imx27_mxc_w1_data)
+
 extern const struct imx_spi_imx_data imx27_cspi_data[] __initconst;
 #define imx27_add_cspi(id, pdata)	\
 	imx_add_spi_imx(&imx27_cspi_data[id], pdata)