net: dsa: Remove the use of dev_err_probe()

The dev_err_probe() doesn't do anything when error is '-ENOMEM'.
Therefore, remove the useless call to dev_err_probe(), and just
return the value instead.

Signed-off-by: Xichao Zhao <zhao.xichao@vivo.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250820085749.397586-3-zhao.xichao@vivo.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>