PCI/sysfs: Add 'devspec' newline

Previously, when the value of the "devspec" sysfs attribute was read from
the user space there was no newline present, and utilities such as "cat"
wouldn't display the result of the read correctly.

Append a newline character in the show() function to match other "devspec"
attributes.

Link: https://lore.kernel.org/r/20210603000112.703037-5-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>

drivers/pci/pci-sysfs.c

@@ -537,7 +537,7 @@ static ssize_t devspec_show(struct device *dev,
 
 	if (np == NULL)
 		return 0;
-	return sysfs_emit(buf, "%pOF", np);
+	return sysfs_emit(buf, "%pOF\n", np);
 }
 static DEVICE_ATTR_RO(devspec);
 #endif