mixmrt/machine_i2s: Add I2S protocol support.

This commit adds support for machine.I2S on the mimxrt port.  The I2S API
is consistent with the existing stm32, esp32, and rp2 implementations.

I2S features:
- controller transmit and controller receive
- 16-bit and 32-bit sample sizes
- mono and stereo formats
- sampling frequencies from 8kHz to 48kHz
- 3 modes of operation:
  - blocking
  - non-blocking with callback
  - uasyncio
- configurable internal buffer
- optional MCK

Tested with the following development boards:
- MIMXRT1010_EVK, MIMXRT1015_EVK, MIMXRT1020_EVK, MIMXRT1050_EVK
- Teensy 4.0, Teensy 4.1
- Olimex RT1010
- Seeed ARCH MIX

Tested with the following I2S hardware peripherals:
- UDA1334
- GY-SPH0645LM4H
- WM8960 codec on board the MIMXRT boards and separate breakout board
- INMP441
- PCM5102
- SGTL5000 on the Teensy audio shield

Signed-off-by: Mike Teachman <mike.teachman@gmail.com>

ports/mimxrt/machine_spi.c

@@ -30,7 +30,7 @@
 #include "py/mperrno.h"
 #include "extmod/machine_spi.h"
 #include "modmachine.h"
-#include "dma_channel.h"
+#include "dma_manager.h"
 
 #include "fsl_cache.h"
 #include "fsl_dmamux.h"
@@ -256,8 +256,6 @@ STATIC void machine_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8
     bool use_dma = chan_rx >= 0 && chan_tx >= 0;
 
     if (use_dma) {
-        edma_config_t userConfig;
-
         /* DMA MUX init*/
         DMAMUX_Init(DMAMUX);
 
@@ -267,8 +265,7 @@ STATIC void machine_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8
         DMAMUX_SetSource(DMAMUX, chan_tx, dma_req_src_tx[self->spi_hw_id]);
         DMAMUX_EnableChannel(DMAMUX, chan_tx);
 
-        EDMA_GetDefaultConfig(&userConfig);
-        EDMA_Init(DMA0, &userConfig);
+        dma_init();
 
         lpspi_master_edma_handle_t g_master_edma_handle;
         edma_handle_t lpspiEdmaMasterRxRegToRxDataHandle;