disable uart0 uart7 uart9

hc

2023-11-22 983d7f83616922a6439b4352d1b3af488ee27f95

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