phy: marvell: phy-mvebu-cp110-comphy: improve eth_port1 on comphy4

phy: marvell: phy-mvebu-cp110-comphy: improve eth_port1 on comphy4

According to the CN9100_MPP_information document, CP_SRD4 (comphy 4)
supports 2500 BASE-X and 5000 BASE-R for ETH_PORT1. I was able to test
that 2500 BASE-X is indeed supported. Unfortunately, our HW does not
support 5000 BASE-R, but I assume from the document that it does, so I
set the muxing there too to 0x1.

Signed-off-by: Stefan Eichenberger <eichest@gmail.com>
Link: https://lore.kernel.org/r/20240711131612.98952-1-eichest@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>