HP Max/Min Volume for snow
HP Max/Min Volume for snow

It makes max volume at 1dB which makes good sound Snow Headphone.
Without this patch, It makes distortion in sign wave

BUG=chrome-os-partner:13604
TEST=check i2c value 0x1b when you go into max volume
     i2cget -y -f 7 0x11 0x65
     check i2c value 0x5 when you go into min volume

Change-Id: I262c564eeaab92d9ab69ace4772f6bbd795039e6
Reviewed-on: https://gerrit.chromium.org/gerrit/32292
Reviewed-by: Dylan Reid <c791bfe44996c1eed9c7149a0c5f12a86d58eb85@chromium.org>
Tested-by: Wonjoon Lee <b961a80bc33bbc19346c547d1234eeb868c7ae74@samsung.com>
Commit-Ready: Wonjoon Lee <b961a80bc33bbc19346c547d1234eeb868c7ae74@samsung.com>

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