Merge branch 'net-spacemit-a-few-error-handling-fixes'

Vivian Wang says:

====================
net: spacemit: A few error handling fixes

Recently a user reported a supposed UAF/double-free in this driver.
It turned out to be a false positive (ugh) from a bug with riscv's
kfence_protect_page() [1], but it did also prompt me to review the
driver code yet again. These are some fixes for error handling problems
that I've found.

[1]: https://lore.kernel.org/r/20260303-handle-kfence-protect-spurious-fault-v2-0-f80d8354d79d@iscas.ac.cn/
====================

Link: https://patch.msgid.link/20260305-k1-ethernet-more-fixes-v2-0-e4e434d65055@iscas.ac.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>