drivers: net: qfec: Reset PHY during init.

When the chip is soft reset but the PHY is not, the ethernet
link does not come up. The PHY and MAC go out of sync. Reseting
PHY starts auto-negotiation.

Change-Id: I379774908dc8a536080cc1d5600eeda57da28e88
Acked-by: Kaushik Sikdar <ksikdar@qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>