msm: 8660: audio: Fix tones issue on headset in FTM.

-Play tones in FTM mode,for testcase 1 it is expected to
play only on left headset but audible in both
L&R headset.
-The device profile is enabling the right channel also,
where the test case is to enable only the left channel.
-changed the register 0x31 with  0xC5(disabling the
right channel),this will fix the issue.

Change-Id: I17331f6f2ea8d40c47e5720ae262458536f44094
CRs-Fixed: 332075
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>