Scott Long 99e7a4ad9e Return a C errno for cam_periph_acquire().
There's no compelling reason to return a cam_status type for this
function and doing so only creates confusion with normal C
coding practices. It's technically an API change, but the periph API
isn't widely used. No efffective change to operation.

Reviewed by:	imp, mav, ken
Sponsored by:	Netflix
Differential Revision:	D14063
2018-02-06 06:42:25 +00:00
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