net: phylink: use sfp_get_module_caps()

Use sfp_get_module_caps() to get SFP module's capabilities.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1uydVp-000000061WW-08YM@rmk-PC.armlinux.org.uk


Signed-off-by: Jakub Kicinski <kuba@kernel.org>