arm64: dts: qcom: sc7280: Add GPI DMAengines

The Qualcomm SC7280 has two GPI DMAengines, add definitions for these.

Co-developed-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220421115526.1828659-1-vkoul@kernel.org