dmaengine: fix is_slave_direction() return false when DMA_DEV_TO_DEV

stable inclusion
from stable-v4.19.307
commit 743259cc178aee41626f5929ed9ea6f63bb0c631
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I970CO


CVE: NA

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[ Upstream commit a22fe1d6dec7e98535b97249fdc95c2be79120bb ]

is_slave_direction() should return true when direction is DMA_DEV_TO_DEV.

Fixes: 49920bc6 ("dmaengine: add new enum dma_transfer_direction")
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240123172842.3764529-1-Frank.Li@nxp.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>