net: sh_eth: Pass struct port_info around

net: sh_eth: Pass struct port_info around

The struct sh_eth_dev .port member is always set to 0, therefore only
single-ported SH Ethernet is ever used. Support for multiple SH Ethernet
ports implemented on driver level is a remnant from before U-Boot DM
existed.

Pass struct sh_eth_info port_info around directly and remove the
struct sh_eth_dev entirely. Handling of multiple ports should be done
by U-Boot DM and multiple per-driver-instance private data.

No functional change intended.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>