Merge branch 'txgbe-phylink-support'

Jiawen Wu says:

====================
TXGBE PHYLINK support

Implement I2C, SFP, GPIO and PHYLINK to setup TXGBE link.

Because our I2C and PCS are based on Synopsys Designware IP-core, extend
the i2c-designware and pcs-xpcs driver to realize our functions.
====================

Link: https://lore.kernel.org/r/20230606092107.764621-1-jiawenwu@trustnetic.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>