arm64: dts: qcom: sm8550: Add dma-coherent property

[ Upstream commit 4a03b85b ]

Add dma-coherent property to fastRPC context bank nodes to pass dma
sequence test in fastrpc sanity test, ensure that data integrity is
maintained during DMA operations.

Signed-off-by: Ling Xu <quic_lxu5@quicinc.com>
Link: https://lore.kernel.org/r/20240125102413.3016-2-quic_lxu5@quicinc.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Stable-dep-of: a6a8f54b ("arm64: dts: qcom: sm8550: Fix ADSP memory base and length")
Signed-off-by: Sasha Levin <sashal@kernel.org>