MLK-15004-4: ASoC: fsl_esai: esai workaround for imx8qxp Rev1

MLK-15004-4: ASoC: fsl_esai: esai workaround for imx8qxp Rev1

In imx8qxp rev1, there is hardware issue (TKT331800). ESAI
dma request signal connection issue in SS_ADMA top level
integration, The ESAI dma request signal are active_low, the EDMA
input is high active, but there is no polarity convert logic
between them.

This patch is to add a workaround for this issue. It use the
GPT to convert dma request signal to EDMA, and use anther GPT
to clear the dma request.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>