idpf: fix unloading the xdp program on rmmod

Block the soft reset and vport re-configuration from "idpf_remove()"
context.
The XDP_SETUP_PROG command is normally called while the netdev is being
unregistered. In such a case the IDPF driver should unload the XDP
program and return success. Otherwise, the kernel warning will be shown
in dmesg.

Fixes: 79d940b ("idpf: implement XDP_SETUP_PROG in ndo_bpf for splitq")
Signed-off-by: Michal Kubiak <michal.kubiak@intel.com>

drivers/net/ethernet/intel/idpf/xdp.c

@@ -475,7 +475,8 @@ idpf_xdp_setup_prog(struct idpf_vport *vport, struct netdev_bpf *xdp)
 	int ret;
 
 	info = &vport->adapter->vport_config[vport->idx]->user_config.xdp;
-	reconfig = !!info->prog != !!prog;
+	reconfig = !!info->prog != !!prog &&
+		   !test_bit(IDPF_REMOVE_IN_PROG, vport->adapter->flags);
 
 	xdp_attachment_setup(info, xdp);