add support 4g -- >ppp

hc

2023-11-24 2b26ab132d1b33b91c84c6d732456200e8c5ee77

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CONFIG_BASE_DEFCONFIG="rk3588_defconfig"
CONFIG_ROCKCHIP_EARLY_DISTRO_DTB=y
CONFIG_ROCKCHIP_EARLY_DISTRO_DTB_PATH="/extlinux/toybrick.dtb"