dmaengine: sprd: Add interrupt support for 2-stage transfer
For 2-stage transfer, some users like Audio still need transaction interrupt to notify when the 2-stage transfer is completed. Thus we should enable 2-stage transfer interrupt to support this feature. Signed-off-by: NBaolin Wang <baolin.wang@linaro.org> Signed-off-by: NVinod Koul <vkoul@kernel.org>
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