realtek: pcs: rtl930x: move writes to config

realtek: pcs: rtl930x: move writes to config

Move a few register writes from the ANA_10G patch sequences to the
configuration function. Those write are targeted at digital pages and do
not fully apply for *SGMII modes. To make the ANA_10G sequence really
just deal with analog pages and make it usable for *SGMII modes too,
move out the digital page writes.

Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22582
Signed-off-by: Robert Marko <robimarko@gmail.com>