ARM: dts: msm: disable gpu_isdb cti for trinket

Gpu_isdb cti needs wcss clock to be enabled. gpu clock can't be
turned on from kernel. Disable it.

Change-Id: If863920410c91049cf980ca36e894278687ddded
Signed-off-by: Yuanfang Zhang <zhangyuanfang@codeaurora.org>