bnx2x: Fix BCM57711+BCM84823 link issue

Fix a link problem on the second port of BCM57711 + BCM84823 boards due to
incorrect macro usage.

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>