net: keystone_net: use general get link function

The phy framework has function to get link, so use it
instead of own implementation.

There is no reason to check SGMII link while sending each
packet, phy link is enough. Check SGMII link only while
ethernet open.

Acked-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
2 files changed