asoc: alc5640 Heaphone gain boost

Modified rt5640.c to enable greater output swing
by enabling dynamic control of charge pump as well
as adding headphone DC calibration and power
management changes.

bug 1211589

Change-Id: Icc3a6253c1456d8d66da9c8a04e05a54ae211391
Signed-off-by: Scott Peterson <speterson@nvidia.com>
Reviewed-on: http://git-master/r/206851
GVS: Gerrit_Virtual_Submit
Reviewed-by: Rahul Mittal <rmittal@nvidia.com>
Tested-by: Rahul Mittal <rmittal@nvidia.com>
Reviewed-by: Vijay Mali <vmali@nvidia.com>
2 files changed