Merge branch 'dpaa2-add-1000base-x-support'

Russell King says:

====================
dpaa2: add 1000base-X support

This patch series adds 1000base-X support to pcs-lynx and DPAA2,
allowing runtime switching between SGMII and 1000base-X. This is
a pre-requisit for SFP module support on the SolidRun ComExpress 7.

v2: updated with Ioana's r-b's, and comment on backplane support
====================

Link: https://lore.kernel.org/r/20210205103859.GH1463@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>