UPSTREAM: ASoC: rt5682: Change DAC/ADC volume scale

The step of DAC/ADC volume scale changes from 0.375dB to 0.75dB

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
(cherry picked from commit 75094877)
Signed-off-by: Samaga Prasanna Krishna <samaga.krishna@intel.corp-partner.google.com>

BUG=b:110025789
TEST=Test Audio use cases with full SOF 0.6 rebase release series applied.

Change-Id: I1606edde1a5f2751b5e9973ebb11f4d1db911a52
Reviewed-on: https://chromium-review.googlesource.com/1353696


Commit-Ready: Curtis Malainey <cujomalainey@chromium.org>
Tested-by: Hou-hsun Lee <hou-hsun.lee@intel.corp-partner.google.com>
Reviewed-by: Kamal Ap <kamal.ap@intel.com>
Reviewed-by: Curtis Malainey <cujomalainey@chromium.org>