update yocto project uboot patch and readme file

guowenxue

2021-12-26 df8b7cb3178dd71312d415b07007d6987e901c25

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SUMMARY = "Useradd system service and system shell scripts tools package"
PR = "r1"
 
inherit packagegroup
 
RDEPENDS_${PN} = "expand-rootfs sshswitch wpa-conf"