net: altera_tse: Use the correct Kconfig option for the PCS_LYNX dependency

Use the correct Kconfig dependency for altera_tse as PCS_ALTERA_TSE was
replaced by PCS_LYNX.

Fixes: db48abba

 ("net: ethernet: altera-tse: Convert to mdio-regmap and use PCS Lynx")
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>