bnx2x: Enable BCM8726 module transmitter

When 8726 module detection option is disabled, module should be transmitting
regardless of invalid read from EEPROM

Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>