defconfig: sdm855: Enable MSM QMP

MSM QMP is a lightweight communication protocol that supports sending
messages to remote processors within the SoC. Enable QMP to send
and receive messages to remote procs with low memory footprint.

Change-Id: Ie4c0b111395bfc0733901f4f2a9fde23b965d26e
Signed-off-by: Chris Lew <clew@codeaurora.org>