arm64: dts: qcom: sm8550: fix low_svs RPMhPD labels

"low" was written "lov", fix this.

Fixes: 99d33ee6 ("arm64: dts: qcom: sm8550: Add missing RPMhPD OPP levels")
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230601-topic-sm8550-upstream-dp-v4-1-ac2c6899d22c@linaro.org