mtd: OneNAND: allow board init function fail

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
diff --git a/board/micronas/vct/ebi_onenand.c b/board/micronas/vct/ebi_onenand.c
index 62eb648..ef892ca 100644
--- a/board/micronas/vct/ebi_onenand.c
+++ b/board/micronas/vct/ebi_onenand.c
@@ -169,7 +169,7 @@
 	return 0;
 }
 
-void onenand_board_init(struct mtd_info *mtd)
+int onenand_board_init(struct mtd_info *mtd)
 {
 	struct onenand_chip *chip = mtd->priv;
 
@@ -181,4 +181,6 @@
 
 	chip->read_bufferram = ebi_read_bufferram;
 	chip->write_bufferram = ebi_write_bufferram;
+
+	return 0;
 }