add rk809 spk hp

hc

2023-02-15 812ded0d8d6800728c4c11abed7546d735449123

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default buildroot
 
label buildroot
kernel /boot/uImage
devicetree /boot/imx6dl-riotboard.dtb
append console=ttymxc1,115200 root=/dev/mmcblk0p1 rw