Merge branch 'enetc-mqprio-fixes'

Wei Fang sayus:

====================
fix crash issue when setting MQPRIO for VFs

There is a crash issue when setting MQPRIO for ENETC VFs, the root casue
is that ENETC VFs don't like ENETC PFs, they don't have port registers,
so hw->port of VFs is NULL. However, this NULL pointer will be accessed
without any checks in enetc_mm_commit_preemptible_tcs() when configuring
MQPRIO for VFs. Therefore, two patches are added to fix this issue. The
first patch sets ENETC_SI_F_QBU flag only for SIs that support 802.1Qbu.
The second patch adds a check in enetc_change_preemptible_tcs() to ensure
that SIs that do not support 802.1Qbu do not configure preemptible TCs.

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Link: https://lore.kernel.org/imx/20241030082117.1172634-1-wei.fang@nxp.com/
Link: https://lore.kernel.org/imx/20241104054309.1388433-1-wei.fang@nxp.com/
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====================

Signed-off-by: David S. Miller <davem@davemloft.net>