splash: Introduce default_splash_locations

This change introduces default_splash_locations which
simplifies splash recovery from the first partition of
USB/MMC/SATA drive.

Given usual mapping of the first partition of external media for
basic boot stuff like uImage/zImage, .dtb etc it looks quite
obvious option to put there splash.bmp as well.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Simon Glass <sjg@chromium.org>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
Signed-off-by: Anatolij Gustschin <agust@denx.de>

common/splash.c

@@ -24,9 +24,37 @@
 #include <splash.h>
 #include <lcd.h>
 
+static struct splash_location default_splash_locations[] = {
+	{
+		.name = "sf",
+		.storage = SPLASH_STORAGE_SF,
+		.flags = SPLASH_STORAGE_RAW,
+		.offset = 0x0,
+	},
+	{
+		.name = "mmc_fs",
+		.storage = SPLASH_STORAGE_MMC,
+		.flags = SPLASH_STORAGE_FS,
+		.devpart = "0:1",
+	},
+	{
+		.name = "usb_fs",
+		.storage = SPLASH_STORAGE_USB,
+		.flags = SPLASH_STORAGE_FS,
+		.devpart = "0:1",
+	},
+	{
+		.name = "sata_fs",
+		.storage = SPLASH_STORAGE_SATA,
+		.flags = SPLASH_STORAGE_FS,
+		.devpart = "0:1",
+	},
+};
+
 __weak int splash_screen_prepare(void)
 {
-	return 0;
+	return splash_source_load(default_splash_locations,
+				  ARRAY_SIZE(default_splash_locations));
 }
 
 #ifdef CONFIG_SPLASH_SCREEN_ALIGN

include/splash.h

@@ -47,7 +47,16 @@ struct splash_location {
 	char *ubivol;	/* UBI volume-name for ubifsmount */
 };
 
+#ifdef CONFIG_SPLASH_SOURCE
 int splash_source_load(struct splash_location *locations, uint size);
+#else
+static inline int splash_source_load(struct splash_location *locations,
+				     uint size)
+{
+	return 0;
+}
+#endif
+
 int splash_screen_prepare(void);
 
 #ifdef CONFIG_SPLASH_SCREEN_ALIGN