Correct the initial value of the BASEPRI register.  This was apparently never being initialized.  From Max

Audio:  Get rid of the decoder->driver IOCTLs that I added a couple of commits back; Use existing configure method

Audio:  Add hooks for fast-forward and rewind needed by CMediaPlayer; add hooks for equalizer settings needed by the WM8904

NxWM: Beginning integration of NxPlayer into Nxwm::MediaPlayer. Gets handle, sets device, and releases handle.  Lots more to be done

SAMA5D4-EK NSH:  Enable the command line media player in the NSH configuration as well (still does not work, however).

SAMA5D3/4: All configurations.  I suspect a MMC/SD multi-block DMA transfer issue.  So for name, this feature is disabled in all configurations

Rename pcm_decode.h to pcm.h since it will hold more than just decoding definitions.  Fix some porting errors like idbg should auddbg, etc.  Add wav file header and a few low-level wav utilities.

Add new framework for the PCM decoder.  It is now a 'front end' for lower-level drivers like the WM8904 that performs the PCM decoding from end

STM32 OTGFS device:  Various changes to try to reduce that amount of time in interrupts handles and with interrupts disbled.  Needs verification on other platforms.  From Petteri Aimonen