net: xilinx: axienet: Don't set IFF_PROMISC in ndev->flags

Contrary to the comment, we don't have to inform the net subsystem.
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240822154059.1066595-5-sean.anderson@linux.devSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/xilinx/xilinx_axienet_main.c

@@ -439,11 +439,6 @@ static void axienet_set_multicast_list(struct net_device *ndev)
 
 	if (ndev->flags & (IFF_ALLMULTI | IFF_PROMISC) ||
 	    netdev_mc_count(ndev) > XAE_MULTICAST_CAM_TABLE_NUM) {
-		/* We must make the kernel realize we had to move into
-		 * promiscuous mode. If it was a promiscuous mode request
-		 * the flag is already set. If not we set it.
-		 */
-		ndev->flags |= IFF_PROMISC;
 		reg = axienet_ior(lp, XAE_FMI_OFFSET);
 		reg |= XAE_FMI_PM_MASK;
 		axienet_iow(lp, XAE_FMI_OFFSET, reg);