Add driver for NXP DMIC peripheral. This peripheral is present on the
iMX RT5xx and iMX RT6xx parts, as well as some LPC SOCs. The following
features are supported:
- up to 2 simultaneous channels of L/R PCM data (4 channels are not
supported due to limitations of the DMA engine)
- individual configuration of gain and filter parameters for each DMIC
channel input
The driver has been tested with up to 4 PCM data streams (2 L/R channels),
as well as the MEMS microphones present on the RT595 EVK.
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
Co-authored-by: Yves Vandervennet <yves.vandervennet@nxp.com>
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