a0001: Correct truly panel on commands, add gamma commands

Change-Id: Id38f4f5c7ad70478fbe283606359aae72c9cdd2e
a0001: Update truly panel DTSI for MDSS changes

Change-Id: Ic1bdd095e27f4d13c64a6b1e5c0ad8f125de2481
asoc: wcd9xxx: Sweet MBHC lovins

 * Add special case for higher impedance headsets which require full
   micbias to detect and enable.

Change-Id: I9ae0a6d460644ed192e0bc904949fd8b4f0e5b09