Merge branch 'net-psp-add-more-validation'

Jakub Kicinski says:

====================
net: psp: add more validation

Address some AI code-scan issues with the PSP code.
I don't think any of these are real bugs, but they may
become bugs in the future. The two real bugs discovered
were posted separately for net. AI reports 3 more which
seem plain wrong (rx SPI "leak" on error etc.).
====================

Link: https://patch.msgid.link/20260428205352.1247325-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>