eth: fbnic: Accept minimum anti-rollback version from firmware

fbnic supports applying firmware which may not be rolled back. This is
implemented in firmware however it is useful for the driver to know the
minimum supported firmware version. This will enable the driver validate
new firmware before it is sent to the NIC. If it is too old the driver can
provide a clear message that the version is too old.

Signed-off-by: Lee Trager <lee@trager.us>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250512190109.2475614-3-lee@trager.us


Signed-off-by: Paolo Abeni <pabeni@redhat.com>