defconfig: 8610: disable coresight for perf defconfig

Disable CoreSight drivers for perf defconfig to avoid power and
performance penalties. This will also reduce memory utilization.

Disabling CoreSight drivers also results in disabling JTag save
and restore code.

Change-Id: I60187be95450348aafe8e6aba7490716f57a6d9e
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>