ipmi: convert tracking of the ACPI device pointer to a PNP device

Convert PNP patch (git 9e368fa0) to
maintain a pointer to a PNP device, 'pnp_dev', instead of the ACPI device,
'acpi_dev', that is currently being tracked with PNP based IPMI device
discovery.
Signed-off-by: NMyron Stowe <myron.stowe@hp.com>
Acked-by: NZhao Yakui <yakui.zhao@intel.com>
Acked-by: NCorey Minyard <minyard@acm.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/char/ipmi/ipmi_si_intf.c

@@ -2183,7 +2183,7 @@ static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
 		info->irq_setup = std_irq_setup;
 	}
 
-	info->dev = &acpi_dev->dev;
+	info->dev = &dev->dev;
 	pnp_set_drvdata(dev, info);
 
 	return add_smi(info);