boot: Use fit_image_get_data() to get data

Use this function instead of fit_image_get_emb_data() data, since it
works will FITs that use external data.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/splash_source.c b/common/splash_source.c
index 5ac32a2..2df78a4 100644
--- a/common/splash_source.c
+++ b/common/splash_source.c
@@ -395,21 +395,10 @@
 	}
 
 	/* Extract the splash data from FIT */
-	/* 1. Test if splash is in FIT internal data. */
-	if (!fit_image_get_emb_data(fit_header, node_offset,
-				    &internal_splash_data,
-				    &internal_splash_size))
-		memmove((void *)(uintptr_t)bmp_load_addr, internal_splash_data, internal_splash_size);
-	/* 2. Test if splash is in FIT external data with fixed position. */
-	else if (!fit_image_get_data_position(fit_header, node_offset, &external_splash_addr))
-		is_splash_external = true;
-	/* 3. Test if splash is in FIT external data with offset. */
-	else if (!fit_image_get_data_offset(fit_header, node_offset, &external_splash_addr)) {
-		/* Align data offset to 4-byte boundary */
-		fit_size = ALIGN(fdt_totalsize(fit_header), 4);
-		/* External splash offset means the offset by end of FIT header */
-		external_splash_addr += location->offset + fit_size;
-		is_splash_external = true;
+	if (!fit_image_get_data(fit_header, node_offset, &internal_splash_data,
+				&internal_splash_size)) {
+		memmove((void *)(uintptr_t)bmp_load_addr, internal_splash_data,
+			internal_splash_size);
 	} else {
 		printf("Failed to get splash image from FIT\n");
 		return -ENODATA;