Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: fef29982 ("net: altera: tse: convert to phylink")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sun Ke <sunke32@huawei.com>
Link: https://lore.kernel.org/r/20220920020041.2685948-1-sunke32@huawei.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>