libata: remove ata_is_nodata

The only caller can just check for !ata_is_data instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>

drivers/ata/libata-core.c

@@ -5044,7 +5044,7 @@ static void ata_verify_xfer(struct ata_queued_cmd *qc)
 {
 	struct ata_device *dev = qc->dev;
 
-	if (ata_is_nodata(qc->tf.protocol))
+	if (!ata_is_data(qc->tf.protocol))
 		return;
 
 	if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))

include/linux/libata.h

@@ -1070,11 +1070,6 @@ static inline bool ata_is_atapi(u8 prot)
 	return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
 }
 
-static inline bool ata_is_nodata(u8 prot)
-{
-	return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
-}
-
 static inline bool ata_is_pio(u8 prot)
 {
 	return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;