[][kernel][common][eth][Add phylink pcs_enable and pcs_disable methods]

[Description]
Add phylink pcs_enable and pcs_disable methods from Linux-6.6.

Without this patch, the phylink framework is unable to enable or
disable PCS.

[Release-log]
N/A


Change-Id: I66f217e7279c152ef3f093d6c31c072c1dac423f
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9070480
1 file changed