defconfig: fsm9900: Add perf defconfig

Add new configuration for fsm9900 to disable debugging options
for performance.

Change-Id: I1bde3d5caf6e83d820b534b07ae53e22caa25cc6
Acked-by: Kaushik Sikdar <ksikdar@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>