dma/ioat: replace printf with log

rte_log should be used instead of printf within the drivers. This patch
changes a printf within the ioat dma driver's start function to an rte log.
The printfs within ioat's dump function will be retained

Signed-off-by: Conor Walsh <conor.walsh@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

Author: conorwalsh-intel

drivers/dma/ioat/ioat_dmadev.c

@@ -156,7 +156,7 @@ ioat_dev_start(struct rte_dma_dev *dev)
 	ioat->offset = 0;
 	ioat->failure = 0;
 
-	printf("IOAT.status: %s [0x%"PRIx64"]\n",
+	IOAT_PMD_DEBUG("channel status - %s [0x%"PRIx64"]\n",
 			chansts_readable[ioat->status & IOAT_CHANSTS_STATUS],
 			ioat->status);