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-mx3/devices-imx35.h b/arch/arm/mach-mx3/devices-imx35.h
index 5eb917b..7602cb4 100644
--- a/arch/arm/mach-mx3/devices-imx35.h
+++ b/arch/arm/mach-mx3/devices-imx35.h
@@ -40,6 +40,10 @@
 #define imx35_add_mxc_nand(pdata)	\
 	imx_add_mxc_nand(&imx35_mxc_nand_data, pdata)
 
+extern const struct imx_mxc_w1_data imx35_mxc_w1_data __initconst;
+#define imx35_add_mxc_w1(pdata)	\
+	imx_add_mxc_w1(&imx35_mxc_w1_data)
+
 extern const struct imx_spi_imx_data imx35_cspi_data[] __initconst;
 #define imx35_add_cspi(id, pdata)	\
 	imx_add_spi_imx(&imx35_cspi_data[id], pdata)