rtl_hw_start_8168 inherits the content of rtl_hw_start_8169 minus
the code which depends on RTL_GIGA_MAC_VER_XY (XY != {11/12}).
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Edward Hsu <edward_hsu@realtek.com.tw>