add support 4g -- >ppp

hc

2023-11-24 2b26ab132d1b33b91c84c6d732456200e8c5ee77

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# From https://raw.githubusercontent.com/Xilinx/u-boot-xlnx
sha1    940331ee02b0007099effa61e382fe7ea4174054    zynq-boot-bin.py