[TG3]: Disable TSO on 5906 if CLKREQ is enabled.

Due to hardware errata, TSO must be disabled if the PCI Express clock
request is enabled on 5906.  The chip may hang when transmitting TSO
frames if CLKREQ is enabled.

Update version to 3.69.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>