Add mainline status template for MT8189 based devices
In upstream the MT8189 is the first variation of the SoC which is also in Genio 520 (MT8371) and Genio 720 (MT8391), hence the 8189 naming
In upstream the MT8189 is the first variation of the SoC which is also in Genio 520 (MT8371) and Genio 720 (MT8391), hence the 8189 naming