usb: phy-msm-hsusb: Add support to vote for 3.15 V in Host mode

Some of SNPS USB2 picoPhy revisions do not operate correctly
during full speed host mode at subzero temperature. Work around
this issue by increasing the maximum allowed PM8994 LDO 24 voltage
from 3.05 V to 3.15 V for phy analog 3.3 voltage domain.

CRs-Fixed: 705190
Change-Id: Ie8b13fe34faa4bc6811ab8ccaab7aea5b53b29a2
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>