defconfig: fsm9900: disable msm_ssbi and enable posix mqueue

This disables msm_ssbi and enables posix mqueue.

Change-Id: I12e878d204aa25efabca7b0110f34c1374fd1f97
Acked-by: Kaushik Sikdar <ksikdar@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>