dt-bindings: dma: qcom,gpi: Document GPI DMA engine for Hawi SoC

dt-bindings: dma: qcom,gpi: Document GPI DMA engine for Hawi SoC

The Hawi GPI DMA engine follows the same programming model and
register interface as previous generation of Qualcomm SoCs like
kaanapali, glymur, and is fully compatible with earlier GPI DMA
implementations.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Xueyao An <xueyao.an@oss.qualcomm.com>
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260401124028.589931-1-mukesh.ojha@oss.qualcomm.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>