ata: pata_artop: use *switch* in artop_init_one()

This driver uses a string of the *if* statements in artop_init_one()
where the *switch* statement would fit better.  While fixing this,
refactor the 6280 code to e.g. avoid a compound statement inside
the *case* section...

Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

drivers/ata/pata_artop.c

@@ -28,7 +28,7 @@
 #include <linux/ata.h>
 
 #define DRV_NAME	"pata_artop"
-#define DRV_VERSION	"0.4.6"
+#define DRV_VERSION	"0.4.7"
 
 /*
  *	The ARTOP has 33 Mhz and "over clocked" timing tables. Until we
@@ -394,16 +394,19 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 	if (rc)
 		return rc;
 
-	if (id->driver_data == 0)	/* 6210 variant */
+	switch (id->driver_data) {
+	case 0:		/* 6210 variant */
 		ppi[0] = &info_6210;
-	else if (id->driver_data == 1)	/* 6260 */
+		break;
+	case 1:		/* 6260 */
 		ppi[0] = &info_626x;
-	else if (id->driver_data == 2)	{ /* 6280 or 6280 + fast */
-		unsigned long io = pci_resource_start(pdev, 4);
-
-		ppi[0] = &info_628x;
-		if (inb(io) & 0x10)
+		break;
+	case 2:		/* 6280 or 6280 + fast */
+		if (inb(pci_resource_start(pdev, 4)) & 0x10)
 			ppi[0] = &info_628x_fast;
+		else
+			ppi[0] = &info_628x;
+		break;
 	}
 
 	BUG_ON(ppi[0] == NULL);