Staging: dgnc: dgnc_driver: Add a missing call to dgnc_tty_uninit

This function is called on the previous and the next failure branches.
This patch adds the call on the branch where it seems to be missing.

Signed-off-by: Quentin Lambert <lambert.quentin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/dgnc/dgnc_driver.c b/drivers/staging/dgnc/dgnc_driver.c
index d705e68..ec7c155 100644
--- a/drivers/staging/dgnc/dgnc_driver.c
+++ b/drivers/staging/dgnc/dgnc_driver.c
@@ -558,6 +558,7 @@
 
 	rc = dgnc_finalize_board_init(brd);
 	if (rc < 0) {
+		dgnc_tty_uninit(brd);
 		pr_err(DRVSTR ": Can't finalize board init (%d)\n", rc);
 		brd->state = BOARD_FAILED;
 		brd->dpastatus = BD_NOFEP;