Add a per-SerDes probe hook to rtpcs_config, called once for each SerDes
during driver probe. This provides a place for variant-specific, one-time
per-SerDes initialization that doesn't fit into the existing controller-
level init hook — such as allocating per-lane regmap fields or assigning
per-SerDes metadata.
Add stub implementations for all variants for now. They will be used by
all variants in a subsequent comment. For RTL839x, reuse the existing
rtl839x_sds_init hook and move its call out of the global init.
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22941
Signed-off-by: Robert Marko <robimarko@gmail.com>
c32e90a396