cifs: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding multiple break/goto statements instead of
just letting the code fall through to the next case.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 9ee5f30..ac01f96 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -771,6 +771,7 @@ cifs_get_file_info(struct file *filp)
 		 */
 		rc = 0;
 		CIFS_I(inode)->time = 0;
+		goto cgfi_exit;
 	default:
 		goto cgfi_exit;
 	}