dt-bindings: dmaengine: qcom: gpi: add compatible for SM6115

Document the compatible for GPI DMA controller on SM6115 SoC.

Signed-off-by: Adam Skladowski <a39.skl@gmail.com>
Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221030094258.486428-4-iskren.chernev@gmail.com


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