cxgb3: fix linkup issue

I encountered an issue that not to link up on cxgb3 fabric.
I bisected and found that this regression was introduced by
0f07c4ee

.

Correct to pass phy_addr to cphy_init() at t3_xaui_direct_phy_prep().

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Acked-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>