soc: qcom: pil: Reorder votes for vdd_modem to be proxy voted

VDD_MODEM is used for modem Q6 block and will need to be controlled
by modem after it has come out of reset.

Change-Id: Ie3fe8d91206eab73d49790e516e3a99cde154045
Signed-off-by: Kyle Yan <kyan@codeaurora.org>