dt-bindings: dma: fsl-edma: Add fsl-edma.h to prevent hardcoding in dts

[ Upstream commit 1e9b0525 ]

Introduce a common dt-bindings header file, fsl-edma.h, shared between
the driver and dts files. This addition aims to eliminate hardcoded values
in dts files, promoting maintainability and consistency.

DTS header file not support BIT() macro yet. Directly use 2^n number.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231114154824.3617255-3-Frank.Li@nxp.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>
Stable-dep-of: a79f949a ("dmaengine: fsl-edma: correct max_segment_size setting")
Signed-off-by: Sasha Levin <sashal@kernel.org>