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

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: I4bf013932d5d064c982d2055e576965aafe3c076
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>