s5p_mmc: support 8-bit bus width

This Patch do support 8-bit bus width for s5p
So we add parameter for bus_width (in s5p_mmc_init(), s5p_mmc_initialize())
If want to use 8-bit bus width, only change (0, 8) instead of (0, 4).

 Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
 Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
 Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
diff --git a/board/samsung/goni/goni.c b/board/samsung/goni/goni.c
index 4336729..0b09eba 100644
--- a/board/samsung/goni/goni.c
+++ b/board/samsung/goni/goni.c
@@ -87,6 +87,6 @@
 		gpio_set_drv(&s5pc110_gpio->g0, i, GPIO_DRV_4X);
 	}
 
-	return s5p_mmc_init(0);
+	return s5p_mmc_init(0, 4);
 }
 #endif