arm64: dts: qcom: pmi8998: enable rradc by default

There is no need for the RRADC to be disabled by default,
lets just enable it by default and not clutter up DT.

Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230524-pmi8998-charger-dts-v2-1-2a5c77d2ff0c@linaro.org