Merge branch 'gve-bug-fixes-for-header-split-and-ptp'

Harshitha Ramamurthy says:

====================
gve: Bug fixes for header-split and PTP

This series contains 2 bug fixes for gve.

Patch 1 fixes an issue which causes TX timeouts due to HW detection of
an illegal descriptor. This happens when receiving header-only packets
with header split enabled - this produces an SKB with a zero-length
fragment.

Patch 2 prevents a kernel NULL pointer dereference by stubbing the PTP
adjfine callback.
====================

Link: https://patch.msgid.link/20260807224315.234152-1-hramamurthy@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>