bnxt_en: Remove unused field "ref_count" in struct bnxt_ulp

JIRA: https://issues.redhat.com/browse/RHEL-76565

commit 5bccacb
Author: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Date:   Thu Apr 17 10:24:47 2025 -0700

    bnxt_en: Remove unused field "ref_count" in struct bnxt_ulp

    The "ref_count" field in struct bnxt_ulp is unused after
    commit a43c26f ("RDMA/bnxt_re: Remove the sriov config callback").
    So we can just remove it now.

    Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
    Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
    Signed-off-by: Michael Chan <michael.chan@broadcom.com>
    Link: https://patch.msgid.link/20250417172448.1206107-4-michael.chan@broadcom.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Shruti Parab <shruti.parab@broadcom.com>

Author: Shruti Parab

drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c

@@ -148,7 +148,6 @@ void bnxt_unregister_dev(struct bnxt_en_dev *edev)
 	struct net_device *dev = edev->net;
 	struct bnxt *bp = netdev_priv(dev);
 	struct bnxt_ulp *ulp;
-	int i = 0;
 
 	ulp = edev->ulp_tbl;
 	rtnl_lock();
@@ -164,10 +163,6 @@ void bnxt_unregister_dev(struct bnxt_en_dev *edev)
 	synchronize_rcu();
 	ulp->max_async_event_id = 0;
 	ulp->async_events_bmap = NULL;
-	while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
-		msleep(100);
-		i++;
-	}
 	mutex_unlock(&edev->en_dev_lock);
 	rtnl_unlock();
 	return;

drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h

@@ -50,7 +50,6 @@ struct bnxt_ulp {
 	unsigned long	*async_events_bmap;
 	u16		max_async_event_id;
 	u16		msix_requested;
-	atomic_t	ref_count;
 };
 
 struct bnxt_en_dev {