eth: fbnic: Advertise supported XDP features.

Drivers are supposed to advertise the XDP features they support. This was
missed while adding XDP support.

Before:
$ ynl --family netdev --dump dev-get
...
 {'ifindex': 3,
  'xdp-features': set(),
  'xdp-rx-metadata-features': set(),
  'xsk-features': set()},
...

After:
$ ynl --family netdev --dump dev-get
...
 {'ifindex': 3,
  'xdp-features': {'basic', 'rx-sg'},
  'xdp-rx-metadata-features': set(),
  'xsk-features': set()},
...

Fixes: 168deb7 ("eth: fbnic: Add support for XDP_TX action")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Dimitri Daskalakis <dimitri.daskalakis1@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260218030620.3329608-1-dimitri.daskalakis1@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: Dimitri Daskalakis

drivers/net/ethernet/meta/fbnic/fbnic_netdev.c

@@ -805,6 +805,8 @@ struct net_device *fbnic_netdev_alloc(struct fbnic_dev *fbd)
 	netdev->hw_enc_features |= netdev->features;
 	netdev->features |= NETIF_F_NTUPLE;
 
+	netdev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_RX_SG;
+
 	netdev->min_mtu = IPV6_MIN_MTU;
 	netdev->max_mtu = FBNIC_MAX_JUMBO_FRAME_SIZE - ETH_HLEN;