spl: Add EXT support to SPL

Add EXT filesystem support to SPL.

Signed-off-by: Guillaume GARDET <guillaume.gardet@free.fr>
[trini: Fix a warning and checkpatch problems]
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/include/spl.h b/include/spl.h
index 4a63c1d..16b3566 100644
--- a/include/spl.h
+++ b/include/spl.h
@@ -74,6 +74,10 @@
 
 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image);
 
+/* SPL EXT image functions */
+int spl_load_image_ext(block_dev_desc_t *block_dev, int partition, const char *filename);
+int spl_load_image_ext_os(block_dev_desc_t *block_dev, int partition);
+
 #ifdef CONFIG_SPL_BOARD_INIT
 void spl_board_init(void);
 #endif