[][kernel][common][eth][Add SGMII_FIXED_2G5 to Maxlinear PHY driver]

[Description]
Add SGMII_FIXED_2G5 to Maxlinear PHY driver.

[Release-log]
N/A

Change-Id: I579f7dd3f57537925bdd5d09a19e13270a8c1681
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6369635
1 file changed