ipmi_si_pci: fix NULL device in ipmi_si error message

I noticed that 4.17.0 logs the follwing during ipmi_si setup:

 ipmi_si 0000:01:04.6: probing via PCI
 (NULL device *): Could not setup I/O space
 ipmi_si 0000:01:04.6: [mem 0xf5ef0000-0xf5ef00ff] regsize 1 spacing 1 irq 21

Fix the "NULL device *) by moving io.dev assignment before its potential
use by ipmi_pci_probe_regspacing().

Result:
 ipmi_si 0000:01:04.6: probing via PCI
 ipmi_si 0000:01:04.6: Could not setup I/O space
 ipmi_si 0000:01:04.6: [mem 0xf5ef0000-0xf5ef00ff] regsize 1 spacing 1 irq 21
Signed-off-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/ipmi_si_pci.c

@@ -115,6 +115,8 @@ static int ipmi_pci_probe(struct pci_dev *pdev,
 	}
 	io.addr_data = pci_resource_start(pdev, 0);
 
+	io.dev = &pdev->dev;
+
 	io.regspacing = ipmi_pci_probe_regspacing(&io);
 	io.regsize = DEFAULT_REGSIZE;
 	io.regshift = 0;
@@ -123,8 +125,6 @@ static int ipmi_pci_probe(struct pci_dev *pdev,
 	if (io.irq)
 		io.irq_setup = ipmi_std_irq_setup;
 
-	io.dev = &pdev->dev;
-
 	dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
 		 &pdev->resource[0], io.regsize, io.regspacing, io.irq);