PCI: Use dev_info() rather than dev_err() for ROM validation

On AMD GPUs, we use several mechanisms to fetch the VBIOS ROM depending on
the platform. We try to read the ROM via the ROM BAR and fall back to
other methods in some cases. This leads to spurious error messages from
the PCI ROM code which are harmless in our case. This leads to bugs being
filed, etc. Change these to dev_info() rather than dev_err() to avoid
that.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=198077
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1462438
Link: https://bugs.freedesktop.org/show_bug.cgi?id=98798
Signed-off-by: Alex Deucher <[e-mail]>
Signed-off-by: Bjorn Helgaas <[e-mail]>
Reviewed-by: Christian König <[e-mail]

drivers/pci/rom.c

···
 		void __iomem *pds;
 		/* Standard PCI ROMs start out with these bytes 55 AA */
 		if (readw(image) != 0xAA55) {
-			dev_err(&pdev->dev, "Invalid PCI ROM header signature: expecting 0xaa55, got %#06x\n",
+			dev_info(&pdev->dev, "Invalid PCI ROM header signature: expecting 0xaa55, got %#06x\n",
 				readw(image));
 			break;
 		}
 		/* get the PCI data structure and check its "PCIR" signature */
 		pds = image + readw(image + 24);
 		if (readl(pds) != 0x52494350) {
-			dev_err(&pdev->dev, "Invalid PCI ROM data signature: expecting 0x52494350, got %#010x\n",
+			dev_info(&pdev->dev, "Invalid PCI ROM data signature: expecting 0x52494350, got %#010x\n",
 				readl(pds));
 			break;
 		}