ARM: dts: msm: Add "smmu_vote" clock to GPU clock list for Trinket

Add "smmu_vote" clock to GPU clock list to allow SW vote for MMU
clock ON request. This clock ensure that GCC based HW clock
gating is disabled for graphics smmu.

Change-Id: If0a62e1f953f687fa976c6ea574ab25a4a9d1f47
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>