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Port number is encoded into argument for SMC call. It is zero for SATA,
PCIe and also both USB 3.0 PHYs. It is non-zero only for Ethernet PHY
(incorrectly called SGMII) on lane 0. Ethernet PHY on lane 1 also uses zero
port number.

So construct "port" bits for SMC call argument can be constructed directly
from PHY type and lane number.

Change driver code to always pass zero port number for non-ethernet PHYs
and for ethernet PHYs determinate port number from lane number. This
simplifies the driver.

As port number from DT PHY configuration is not used anymore, remove whole
driver code which parses it. This also simplifies the driver.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20220203214444.1508-2-kabel@kernel.org

Signed-off-by: Vinod Koul <vkoul@kernel.org>