[][kernel][mt7988][dts][add dts to limit mt7988a pcie and cpu as mt7988d]

[Description]
Add dts to limit mt7988a pcie and cpu as mt7988d.
PCIe: limit 2L_P1 to 1LANE,
CPU: limit to 3 cores.

[Release-log]
N/A

Change-Id: I7253a22d6a1648666164e81edc3b1ecd1d4c3a9e
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7453575
2 files changed