net: phy: add registers to support 1000BASE-T1

commit cedf71ec97aac36ba2bec9989dc8285ef257ecd5 from
https://github.com/nxp-auto-linux/linux



Add registers and definitions to support 1000BASE-T1. This includes the
PCS Control and Status registers (3.2304 and 3.2305) as well as some
missing bits on the PMA/PMD extended ability register (1.18) and PMA/PMD
CTRL (1.2100) register.

Issue: ALB-10440

Signed-off-by: Stefan Eichenberger <eichest@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
(cherry picked from commit 6f1c646d)
Signed-off-by: Zhantao Tang <zhantao.tang@windriver.com>