splash: support raw image from MMC

The user has now the choice to specify the splash location in the MMC
as a raw storage.

Signed-off-by: Julien Masson <jmasson@baylibre.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/common/splash.c b/common/splash.c
index 0e520cc..5206e35 100644
--- a/common/splash.c
+++ b/common/splash.c
@@ -40,6 +40,12 @@
 		.devpart = "0:1",
 	},
 	{
+		.name = "mmc_raw",
+		.storage = SPLASH_STORAGE_MMC,
+		.flags = SPLASH_STORAGE_RAW,
+		.devpart = "0:1",
+	},
+	{
 		.name = "usb_fs",
 		.storage = SPLASH_STORAGE_USB,
 		.flags = SPLASH_STORAGE_FS,