dmaengine: xilinx: dpdma: Use kernel type u32 over uint32_t

Use u32 kernel type instead of uint32_t. Issue is reported by
checkpatch.pl --strict.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/9569008794d519b487348bfeafbfd76c5da5755e.1624446336.git.michal.simek@xilinx.com


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