ata: Add and use ata_print_version_once

Use a single mechanism to show driver version.
Reduces text a tiny bit too.

Remove uses of static int printed_version
Add and use ata_print_version(const struct device *, const char *ver)
and ata_print_version_once.

$ size drivers/ata/built-in.*
   text	   data	    bss	    dec	    hex	filename
 544969	  73893	 116584	 735446	  b38d6	drivers/ata/built-in.allyesconfig.ata.o
 543870	  73893	 116592	 734355	  b34ad	drivers/ata/built-in.allyesconfig.print_once.o
 141328	  14689	   4220	 160237	  271ed	drivers/ata/built-in.defconfig.ata.o
 141212	  14689	   4220	 160121	  27179	drivers/ata/built-in.defconfig.print_once.o

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index 8fd3b72..cdaebbe 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -1440,15 +1440,13 @@
 static int pdc_sata_init_one(struct pci_dev *pdev,
 			     const struct pci_device_id *ent)
 {
-	static int printed_version;
 	const struct ata_port_info *ppi[] =
 		{ &pdc_port_info[ent->driver_data], NULL };
 	struct ata_host *host;
 	struct pdc_host_priv *hpriv;
 	int i, rc;
 
-	if (!printed_version++)
-		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
+	ata_print_version_once(&pdev->dev, DRV_VERSION);
 
 	/* allocate host */
 	host = ata_host_alloc_pinfo(&pdev->dev, ppi, 4);