WM8904: Add header file support for this forcoming driver
Framework for a WM8904 audio driver.  The initial driver check-in is simply Ken Pettit's VS1053 driver forced to compile with only WM8904 definitions
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WM8904: Add initialization logic
SAMA5D4-EK:  Add WM8904 initialization logic
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SAMA5: Add slow clock support
SAMA5:  Update slow clock logic.  Things work a little differently on the SAMA5D3
SAMA5 PCK:  Add support for the slow clock as the PCK clock source
SAMA5 SCK: The SAMA5D3 does things a little differently
SAMA5D4-EK: Add PCK pin disambiguation
SAMA5D ADC: Fix some typos in conditional compilation
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 The WM8904 audio driver is mostly code complete and ready to begin initial testing
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WM8904 w/NxPlayer: Fix some compile errors and warnings with debug enabled
Merge branch 'master' of http://git.code.sf.net/p/nuttx/git into dev