dt-bindings: dma: drop unneeded quotes

Cleanup by removing unneeded quotes from refs and redundant blank lines.
No functional impact except adjusting to preferred coding style.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> # mediatek
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Hector Martin <marcan@marcan.st> # apple
Acked-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org> # Spear
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> # Renesas
Reviewed-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> # Socionext
Link: https://lore.kernel.org/r/20230124081117.31186-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

dt-bindings: dmaengine: Introduce RZN1 dmamux bindings

The Renesas RZN1 DMA IP is based on a DW core, with eg. an additional
dmamux register located in the system control area which can take up to
32 requests (16 per DMA controller). Each DMA channel can be wired to
two different peripherals.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20220427095653.91804-2-miquel.raynal@bootlin.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>