bnxt_en: Do not allow ethtool -m on an untrusted VF

Block all ethtool module operations on an untrusted VF.  The firmware
won't allow it and will return error.

Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20241217182620.2454075-3-michael.chan@broadcom.com


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