audit: cleanup function braces and assignment-in-if-condition

The patch fixes following checkpatch.pl issue:
ERROR: open brace '{' following function definitions go on the next line
ERROR: do not use assignment in if condition

Signed-off-by: Atul Kumar Pant <atulpant.linux@gmail.com>
[PM: subject line tweaks]
Signed-off-by: Paul Moore <paul@paul-moore.com>