Revert "net: qcom/emac: configure the external phy to allow pause frames"

Revert "net: qcom/emac: configure the external phy to allow pause frames"

This reverts commit 83358196cb3760954a638424d9559fcdcecee5da.

With commit c80e8b75b847 ("net: phy: phy drivers should not set
SUPPORTED_[Asym_]Pause"), phylib now handles automatically enabling
pause frame support in the PHY, and the MAC driver should follow suit.

Since the EMAC driver driver does this,  we no longer need to force
pause frames support.

Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>