dmaengine: pl330: Remove the burst limit for quirk 'NO-FLUSHP'

There is no reason to limit the performance on the 'NO-FLUSHP' SoCs,
because 'FLUSHP' instruction is broken on these platforms, so remove
the limit to improve the efficiency.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Link: https://lore.kernel.org/r/1593439555-68130-2-git-send-email-sugar.zhang@rock-chips.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>