ARM: imx: dynamically register mxc-mmc devices

... plus a trivial simplification of mx21ads_sdhc_init()

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
index e241e41..bb3b29c 100644
--- a/arch/arm/plat-mxc/include/mach/devices-common.h
+++ b/arch/arm/plat-mxc/include/mach/devices-common.h
@@ -151,6 +151,17 @@
 		const struct imx_mx2_camera_data *data,
 		const struct mx2_camera_platform_data *pdata);
 
+#include <mach/mmc.h>
+struct imx_mxc_mmc_data {
+	int id;
+	resource_size_t iobase;
+	resource_size_t irq;
+	resource_size_t dmareq;
+};
+struct platform_device *__init imx_add_mxc_mmc(
+		const struct imx_mxc_mmc_data *data,
+		const struct imxmmc_platform_data *pdata);
+
 #include <mach/mxc_nand.h>
 struct imx_mxc_nand_data {
 	/*