dmaengine: sun61: fix warning on bad print specfier

The sg_dma_len() returns unsigned int but we had driver print it as %zu, use
%u as documented in Documentation/printk-formats.txt

drivers/dma/sun6i-dma.c: In function ‘sun6i_dma_prep_slave_sg’:
drivers/dma/sun6i-dma.c:643: warning: format ‘%zu’ expects type ‘size_t’,
but argument 8 has type ‘unsigned int’
drivers/dma/sun6i-dma.c:661: warning: format ‘%zu’ expects type ‘size_t’,
but argument 8 has type ‘unsigned int’

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/sun6i-dma.c

@@ -641,7 +641,7 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
 				DMA_CHAN_CFG_DST_DRQ(vchan->port);
 
 			dev_dbg(chan2dev(chan),
-				"%s; chan: %d, dest: %pad, src: %pad, len: %zu. flags: 0x%08lx\n",
+				"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
 				__func__, vchan->vc.chan.chan_id,
 				&sconfig->dst_addr, &sg_dma_address(sg),
 				sg_dma_len(sg), flags);
@@ -659,7 +659,7 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
 				DMA_CHAN_CFG_SRC_DRQ(vchan->port);
 
 			dev_dbg(chan2dev(chan),
-				"%s; chan: %d, dest: %pad, src: %pad, len: %zu. flags: 0x%08lx\n",
+				"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
 				__func__, vchan->vc.chan.chan_id,
 				&sg_dma_address(sg), &sconfig->src_addr,
 				sg_dma_len(sg), flags);