e1000: use flush_work_keventd()

e1000: use flush_work_keventd()

Switch e1000 over to flush_work_keventd().  This probably fixes a netdev-close
versus linkwatch rtnl_lock() deadlock which nobody knew about.

(akpm: bypassed maintainers, sorry.  There are other patches which depend on
this)

Cc: "Maciej W. Rozycki" <[email protected]>
Cc: David Howells <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Jeff Garzik <[email protected]>
Acked-by: Auke Kok <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>