dmaengine: sf-pdma: apply proper spinlock flags in sf_pdma_prep_dma_memcpy()

stable inclusion
from stable-v5.10.137
commit 37e1d474a3fb75eda4f0634e3b63c3b1d8b8a17e
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=37e1d474a3fb75eda4f0634e3b63c3b1d8b8a17e



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[ Upstream commit 94b4cd7c ]

The second parameter of spinlock_irq[save/restore] function is flags,
which is the last input parameter of sf_pdma_prep_dma_memcpy().

So declare local variable 'iflags' to be used as the second parameter of
spinlock_irq[save/restore] function.

Signed-off-by: Austin Kim <austin.kim@lge.com>
Link: https://lore.kernel.org/r/20210611065336.GA1121@raspberrypi


Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Wei Li <liwei391@huawei.com>