[][kernel][mt7988][eth][macsec: Add correct clock selection]

[Description]
Add correct clock selection. We need to select two clocks for macsec:
- CK_TOP_MACSEC_SEL:
  - CK_TOP_CB_CKSQ_40M: 40M
  - CK_TOP_CB_SGM_325M: 325M (Use this)
  - CK_TOP_CB_NET1_D8 : 312M
- CK_TOP_NETSYS_TOPS_400M_SEL: (bus clock)
  - CK_TOP_CB_CKSQ_40M: 40M
  - CK_TOP_CB_NET2_D2 : 400M (Use this)

[Release-log]
N/A

Change-Id: I3794ec401e9ef1aad03ffb4ea571f0b0326ed855
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8488121
4 files changed