r8169: do not enable the TBI for the 8168 and the 81x0

r8169: do not enable the TBI for the 8168 and the 81x0

The 8168c and the 8100e choke on it. I have not seen an indication
nor received a report that the TBI is being actively used on the
remaining 8168b and 8110. Let's disable it for now until someone
complains.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Matthias Winkler <m.winkler@unicon-ka.de>
Cc: Maarten Vanraes <maarten.vanraes@gmail.com>
Cc: Edward Hsu <edward_hsu@realtek.com.tw>