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[RK3588] Fix UART baudrate to 115200

Michele Cirinei requested to merge seco_5.10_rk3588 into seco_5.10

DDR binaries for RK3588 use default baudrate 1.5Mbps. With this patch, we fix baudrate to 115200. This fix has the consequence of fixing debug uart baudrate for loader and u-boot, and probably for the whole stack.

This is obtained by:

  • modifying ddr_param.txt
  • using command "./tools/ddrbin_tool ./tools/ddrbin_param.txt bin/rk35/rk3588_ddr_lp4_2112MHz_lp5_2736MHz_v1.10.bin"

At the moment we implement it here, but it would be much better to obtain this in the dedicated recipe in yocto.

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