arm64: dts: qcom: fix indentation error in sm8250 cpu nodes

Use tabs instead of 6 spaces.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Link: https://lore.kernel.org/r/20201123144016.19596-1-jonathan@marek.ca


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>