arm64: dts: qcom: qrb5165-rb5: fix pm8009 regulators

Fix pm8009 compatibility string to reference pm8009 revision specific to
sm8250 platform. Also add S2 regulator to be used for qca639x.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: b1d2674e ("arm64: dts: qcom: Add basic devicetree support for QRB5165 RB5")
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20201231122348.637917-5-dmitry.baryshkov@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>