defconfig: sdm845: Enable CORESIGHT_EVENT on SDM845

CORESIGHT_EVENT enables the coresight abort feature which
aborts the coreSight trace dynamically based on module parameter.

Change-Id: I95fd4e7c16060dc007f27eacf159884ab1791026
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>