mmc: exynos_dw_mmc: Read common bus-width property

Instead of using non-standard "samsung,bus-width" dts property, read
common "bus-width" property used in upstream Linux kernel. It's safe to
do so, as "bus-width" property was already added to corresponding nodes
in all affected Exynos device tree files.

No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/drivers/mmc/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c
index 80dbb38..278019f 100644
--- a/drivers/mmc/s5p_sdhci.c
+++ b/drivers/mmc/s5p_sdhci.c
@@ -166,7 +166,7 @@
 	host->index = dev_id - PERIPH_ID_SDMMC0;
 
 	/* Get bus width */
-	bus_width = fdtdec_get_int(blob, node, "samsung,bus-width", 0);
+	bus_width = fdtdec_get_int(blob, node, "bus-width", 0);
 	if (bus_width <= 0) {
 		debug("MMC: Can't get bus-width\n");
 		return -EINVAL;