r8169: 8168c and later require bit 0x20 to be set in Config2 for PME signaling.

commit d387b427c973974dd619a33549c070ac5d0e089f upstream.

The new 84xx stopped flying below the radars.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Hayes Wang <hayeswang@realtek.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>