add support 4g -- >ppp

hc

2023-11-24 2b26ab132d1b33b91c84c6d732456200e8c5ee77

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#include "rk3399pro_npu.config"
BR2_arm=y
BR2_ROOTFS_OVERLAY="board/rockchip/rk3399pro_npu/fs-overlay-32/"