flash: Rename init_flash_dev to flash_dev_init

Change-Id: I6b9a916053baf09c34100dcb5262a4b66a44bc80
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/mboxd.c b/mboxd.c
index 6ebe596..545d142 100644
--- a/mboxd.c
+++ b/mboxd.c
@@ -369,7 +369,7 @@
 		goto finish;
 	}
 
-	rc = init_flash_dev(context);
+	rc = flash_dev_init(context);
 	if (rc) {
 		goto finish;
 	}