defconfig: Enable preemptirq tracing for sdm845 and sdm670

Enable preemptirq events to trace irqs/preempt disabled callers,
Which help to debug scheduler latency sensitive issues (ex: audio
glitches).

Change-Id: I2a3d4904fa0f8320a2e8df2d3c01a80b2e7895ff
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>