phy: cadence-torrent: Fix error code in cdns_torrent_phy_probe()

This error path should return -EINVAL, but currently it returns
success.

Fixes: d09945ea

 ("phy: cadence-torrent: Check total lane count for all subnodes is within limit")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X9s7Wxq+b6ls0q7o@mwanda
Signed-off-by: Vinod Koul <vkoul@kernel.org>