soc: qcom: rpmhpd: Don't warn about sparse rpmhpd arrays

In some cases the DT binding will fully describe the set of available
RPMh power-domains, but there is no reason for exposing them all in the
implementation.

Omitting individual data->domains is handle gracefully by
of_genpd_add_provider_onecell(), so there's no reason for printing a
warning when this occurs.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20220426233508.1762345-3-bjorn.andersson@linaro.org