audit: update the function comments

Update the function comments to match the code.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
diff --git a/kernel/audit.c b/kernel/audit.c
index 0cf15c7..be1c28fd 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1833,7 +1833,7 @@
 }
 
 /**
- * audit_log_hex - convert a buffer to hex and append it to the audit skb
+ * audit_log_n_hex - convert a buffer to hex and append it to the audit skb
  * @ab: the audit_buffer
  * @buf: buffer to convert to hex
  * @len: length of @buf to be converted