ixgbevf: ensure xdp_ring resources are free'd on error exit

The current error handling for failed resource setup for xdp_ring
data is a break out of the loop and returning 0 indicated everything
was OK, when in fact it is not.  Fix this by exiting via the
error exit label err_setup_tx that will clean up the resources
correctly and return and error status.

Detected by CoverityScan, CID#1466879 ("Logically dead code")

Fixes: 21092e9c ("ixgbevf: Add support for XDP_TX action")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

@@ -3420,7 +3420,7 @@ static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
 		if (!err)
 			continue;
 		hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j);
-		break;
+		goto err_setup_tx;
 	}
 
 	return 0;