net: ethernet: ti: am65-cpsw: Fix build error without PHYLINK

If PHYLINK is n, build fails:

drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_link_ksettings':
am65-cpsw-ethtool.c:(.text+0x118): undefined reference to `phylink_ethtool_ksettings_set'
drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_get_link_ksettings':
am65-cpsw-ethtool.c:(.text+0x138): undefined reference to `phylink_ethtool_ksettings_get'
drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_eee':
am65-cpsw-ethtool.c:(.text+0x158): undefined reference to `phylink_ethtool_set_eee'

Select PHYLINK for TI_K3_AM65_CPSW_NUSS to fix this.

Fixes: e8609e69470f ("net: ethernet: ti: am65-cpsw: Convert to PHYLINK")
Signed-off-by: YueHaibing <[e-mail]>
Reviewed-by: Russell King (Oracle) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/ti/Kconfig

···
 	depends on ARCH_K3 && OF && TI_K3_UDMA_GLUE_LAYER
 	select NET_DEVLINK
 	select TI_DAVINCI_MDIO
+	select PHYLINK
 	imply PHY_TI_GMII_SEL
 	depends on TI_K3_AM65_CPTS || !TI_K3_AM65_CPTS
 	help