defconfig: disable dbgui on perf build for msm8937

If enable dbgui on performance build, qpss clock will be always on.
so need to disable dbgui on performance build to avoid the power and
performance issue.

Change-Id: Ic0a24d8968c32677a0a8c688abd718ff53cd545a
Signed-off-by: Yuanfang Zhang <zhangyuanfang@codeaurora.org>