data-kernel: EMAC: boot up KPI changes

Read early ethernet dtsi flag to enable this feature.
Disable autoneg and configure MAC and PHY with 100 Mbps
link speed.
Read MAC addr, IPv4 and IPv6 addresses from kernel cmd
line parameters in order to assign these to ethernet
interface

Change-Id: I1e42e116afa818dd0afad89caed65ce7b2c274cb
CRs-Fixed: 2333667
Acked-by: Lakshit Tyagi <ltyagi@codeaurora.org>
Acked-by: Nisha Menon <nmenon@qti.qualcomm.com>
Signed-off-by: Sunil Paidimarri <hisunil@codeaurora.org>