netpoll: do not export netpoll_poll_[disable|enable]()

netpoll_poll_disable() and netpoll_poll_enable() are only used
from core networking code, there is no need to export them.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240820162053.3870927-1-edumazet@google.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/core/netpoll.c

@@ -228,7 +228,6 @@ void netpoll_poll_disable(struct net_device *dev)
 		down(&ni->dev_lock);
 	srcu_read_unlock(&netpoll_srcu, idx);
 }
-EXPORT_SYMBOL(netpoll_poll_disable);
 
 void netpoll_poll_enable(struct net_device *dev)
 {
@@ -239,7 +238,6 @@ void netpoll_poll_enable(struct net_device *dev)
 		up(&ni->dev_lock);
 	rcu_read_unlock();
 }
-EXPORT_SYMBOL(netpoll_poll_enable);
 
 static void refill_skbs(void)
 {