defconfig: msm: disable ETM4X for msm8937

Remove CONFIG_CORESIGHT_SOURCE_ETM4X=y in msm8937-perf_defconfig.
This configure will auto enable jtagv8 config and enable jtagv8 driver,
which will vote for QDSS clock in probe and keep it voted.
It can’t be enabled on perf configure due to power concern.

CRs-Fixed: 2245491
Change-Id: I9570b6b6a86355bbb9acf9a4cdbd53e450ecba54
Signed-off-by: Shaoqing Liu <shaoqingliu@codeaurora.org>