regulator: qcom-rpm: Add missing state flag in call to RPM

This adds the missing state parameter to the call down to the RPM. This
is currently hard coded to the active state, as that's all we're
supporting at this moment.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>