iwlegacy: mark il_{grab,release}_nic_access as unlocked

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
diff --git a/drivers/net/wireless/iwlegacy/iwl4965-base.c b/drivers/net/wireless/iwlegacy/iwl4965-base.c
index f3ec8bb..f4eb037 100644
--- a/drivers/net/wireless/iwlegacy/iwl4965-base.c
+++ b/drivers/net/wireless/iwlegacy/iwl4965-base.c
@@ -522,8 +522,8 @@
 	_il_rd(il, CSR_UCODE_DRV_GP1);
 
 	spin_lock_irqsave(&il->reg_lock, flags);
-	if (!il_grab_nic_access(il))
-		il_release_nic_access(il);
+	if (!_il_grab_nic_access(il))
+		_il_release_nic_access(il);
 	spin_unlock_irqrestore(&il->reg_lock, flags);
 }