Remove various deprecated code comments, no functional change.

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

Drop CFG_SH_ETHER_PHY_MODE from configuration files, this value
is never used. No functional change intended.

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

Drop CFG_SH_ETHER_PHY_ADDR from README and configuration files, this
value is never used, PHY address is extracted from control DT instead.
No functional change intended.

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

Drop CFG_SH_ETHER_CACHE_WRITEBACK and CFG_SH_ETHER_CACHE_INVALIDATE,
which are now always enabled in the sh_eth driver, because those cache
operations are always available. On architectures which do not implement
cache operations yet, cache operations have to be implemented first.

CFG_SH_ETHER_ALIGNE_SIZE now set as SH_ETHER_ALIGN_SIZE in sh_eth.h
based on architecture and no longer configured on board level.

Remove CFG_SH_ETHER_CACHE_WRITEBACK configuration option from README.

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

The CFG_SH_ETHER_USE_PORT configuration option is a remnant from
before U-Boot DM existed and SH Ethernet made full use of it, and
is no longer used, remove it.

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

Perform a simple rename of CONFIG_SH_ETHER_USE_PORT to CFG_SH_ETHER_USE_PORT

Signed-off-by: Tom Rini <trini@konsulko.com>

Perform a simple rename of CONFIG_SH_ETHER_PHY_MODE to CFG_SH_ETHER_PHY_MODE

Signed-off-by: Tom Rini <trini@konsulko.com>

Perform a simple rename of CONFIG_SH_ETHER_PHY_ADDR to CFG_SH_ETHER_PHY_ADDR

Signed-off-by: Tom Rini <trini@konsulko.com>

Perform a simple rename of CONFIG_SH_ETHER_CACHE_WRITEBACK to CFG_SH_ETHER_CACHE_WRITEBACK

Signed-off-by: Tom Rini <trini@konsulko.com>

Perform a simple rename of CONFIG_SH_ETHER_CACHE_INVALIDATE to CFG_SH_ETHER_CACHE_INVALIDATE

Signed-off-by: Tom Rini <trini@konsulko.com>