dt-bindings: fsl-imx-sdma: Convert imx sdma to DT schema

dt-bindings: fsl-imx-sdma: Convert imx sdma to DT schema

Convert the i.MX SDMA binding to DT schema format using json-schema.

The compatibles fsl,imx31-to1-sdma, fsl,imx31-to2-sdma, fsl,imx35-to1-sdma
and fsl,imx35-to2-sdma are not used. So need to delete it. The compatibles
fsl,imx50-sdma, fsl,imx6sll-sdma and fsl,imx6sl-sdma are added. The
original binding don't list all compatible used.

In addition, add new peripheral types HDMI Audio.

Signed-off-by: Joy Zou <joy.zou@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221115093823.2879128-2-joy.zou@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>