arm64: dts: sdm850: Remove unnecessary turbo-mode

qcom-cpufreq-hw finds turbo-mode in the LUT hardware tables
and slaps the flag on the last element, so there's no reason
to add it in the dts, so remove it.

Signed-off-by: Steev Klimaszewski <steev@kali.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220718230109.8193-1-steev@kali.org