arm64: dts: qcom: msm8998-fxtec: Decouple from 8998 MTP

While the Pro-1 is based on MTP and is very close to it, it's really not great
for it to include the MTP dtsi straight up, as any small change will affect
both boards and not all of them will apply to the phone as well.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220430162353.607709-13-konrad.dybcio@somainline.org