ARM: dts: msm: remove ufs hw event support on 8994v2

All hardware event clocks are voted on as part of hardware event
enable and voted off as part of hardware event disable. UFS
clocks prevent xo shutdown so remove ufs hardware event support
for now until a better way to support this is implemented.

Change-Id: Id36ca7d23665719dc65ff5c2c97e74f761463f5b
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>