qede: Support 1G advertisment.

Some variants of adapters support the 1G speed capability. Need to
allow the configuration of 1G speed if adapter supports it.

Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>