dt-bindings: dma: fsl-edma: increase maxItems of interrupts and interrupt-names

The edma controller support optional error interrupt, so update interrupts
and interrupt-names's maxItems.

Signed-off-by: Joy Zou <joy.zou@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250407-edma_err-v2-1-9d7e5b77fcc4@nxp.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>