ARM: dts: msm: vote S2F, S5A and S8C for BT

In order to power up BT chip, BT driver needs to vote
for additional S2F for digital at 0.95V, S5A for RFA1
at 1.9V and S8C at 1.35V for RFA2.

Change-Id: Ie6134ee7819496d538acd11b412c390f6b01ba43
Signed-off-by: Mahesh kumar sharma <smahesh@codeaurora.org>