Bluetooth: Rename function bt_err to bt_to_errno

Make it easier to use more normal logging styles later.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/lib.c b/net/bluetooth/lib.c
index b826d1b..4e7cf8b 100644
--- a/net/bluetooth/lib.c
+++ b/net/bluetooth/lib.c
@@ -59,7 +59,7 @@
 EXPORT_SYMBOL(batostr);
 
 /* Bluetooth error codes to Unix errno mapping */
-int bt_err(__u16 code)
+int bt_to_errno(__u16 code)
 {
 	switch (code) {
 	case 0:
@@ -149,4 +149,4 @@
 		return ENOSYS;
 	}
 }
-EXPORT_SYMBOL(bt_err);
+EXPORT_SYMBOL(bt_to_errno);