realtek: phy: simplify RTL8214FC configuration

realtek: phy: simplify RTL8214FC configuration

Initialization of the RTL8214FC was coded like "put the cart
before the horse". Configuration was called from probing
and only when called for the last port.

Testing showed that there is no need to overcomplicate things.
Reorganize the setup as follows:

- Let probe() & config() do what they are meant for
- Split the config part between a package and a port sequence

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/21508
Signed-off-by: Robert Marko <robimarko@gmail.com>