dt-bindings: dma: pl330: Document the quirk 'arm,pl330-periph-burst'

This patch Adds the quirk 'arm,pl330-periph-burst' for pl330.
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1593439555-68130-4-git-send-email-sugar.zhang@rock-chips.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/dma/arm-pl330.txt

@@ -16,6 +16,7 @@ Optional properties:
   - dma-channels: contains the total number of DMA channels supported by the DMAC
   - dma-requests: contains the total number of DMA requests supported by the DMAC
   - arm,pl330-broken-no-flushp: quirk for avoiding to execute DMAFLUSHP
+  - arm,pl330-periph-burst: quirk for performing burst transfer only
   - resets: contains an entry for each entry in reset-names.
 	    See ../reset/reset.txt for details.
   - reset-names: must contain at least "dma", and optional is "dma-ocp".