arm64: dts: qcom: Enable pm8350c pwm for sc7280-idp2

Enable pm8350c pmic pwm support for backlight on sc7280-idp2.

Signed-off-by: Satya Priya <quic_c_skakit@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1645509309-16142-5-git-send-email-quic_c_skakit@quicinc.com