ksmbd: uninitialized variable in create_socket()

The "ksmbd_socket" variable is not initialized on this error path.

Cc: stable@vger.kernel.org
Fixes: 0626e664 ("cifsd: add server handler for central processing and tranport layers")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>