Revert "i40e: Add FW check to disable DCB and wrap autoneg workaround with FW check"

Revert "i40e: Add FW check to disable DCB and wrap autoneg workaround with FW check"

Orabug: 21111674

This commit was included in upstream driver version 1.2.10 however it
caused a regression where the following error is logged when the driver
loads:

i40e 0000:90:00.3: get phy abilities failed, aq_err -7, advertised speed
settings may not be correct

Even the latest upstream driver is affected, so for now revert this
commit until a proper fix is accepted upstream.

This reverts commit 14a9015d3d98cb735fe304204a91ad2a24b979ac.

Signed-off-by: Brian Maly <brian.maly@oracle.com>