huashan: fixup buggy mic (add a missing flag)

looks like we missed a flag
When a person switches the call into loudspeaker mode,
suddenly alsa starts using rear mic as "main" mic,
 and it pretty much renders it unusable if you hold the phone the usual way.

this fixes it :) - needs a little more testing

Props to @peters. and @MrSteve555 for informing me about this.

Change-Id: I5ee16c0c31156e3b4d1e65621bb032d35ee1ad6f
Merge pull request #15 from CyanogenMod/cm-11.0

huashan: fixup buggy mic (add a missing flag)