SM7150 has 5 power levels which correspond to 5 speed-bin values: 0,
128, 146, 167, 172. Speed-bin value is calulated as FMAX/4.8MHz round up
to zero decimal places.

Also a618 on SM7150 uses a615 zapfw. Add a squashed version (.mbn).

Add this as machine = "qcom,sm7150", because speed-bin values are
different from atoll (sc7180/sm7125).
Signed-off-by: Danila Tikhonov <danila@jiaxyga.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/578902/Signed-off-by: Rob Clark <robdclark@chromium.org>