pci-label.c: size_t misspelled as mode_t

no, really, strlen() and snprintf() do not return mode_t values...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index 77cb2a1..81525ae 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -55,7 +55,7 @@
 	SMBIOS_ATTR_INSTANCE_SHOW,
 };
 
-static mode_t
+static size_t
 find_smbios_instance_string(struct pci_dev *pdev, char *buf,
 			    enum smbios_attr_enum attribute)
 {