[][kernel][common][eth][Add SGMII regions to the NETSYS dump]

[Description]
Add SGMII regions to the NETSYS dump.

Without this patch, the NETSYS dump function cannot dump SGMII
registers prior to executing SER.

[Release-log]
N/A


Change-Id: Ie58016bb322ff4dd0bb219ede001969a917c574a
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8998126
3 files changed