add .BoardConfig.mk package-file

hc

2023-05-31 43fd8d44e8182b691c8ee61d487cec02ca11afd2

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# locally computed
sha256    20d3f9b4187fcd9e7007c94558a00bab1191513eee74b6f0d8c7b43f874e06ed  imx-codec-4.2.1.bin