r8169: adjust rtl8169_set_speed_xmii function.

- adjust code of rtl8169_set_speed_xmii function
- remove parts of code which are done in rtl_pll_power_up
  function (8168 only)

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
1 file changed