perf: Clean up trivial style issues in builtin-help.c

Pointed out by checkpatch.

Signed-off-by: Thiago Farina <tfransosi@gmail.com>
Cc: a.p.zijlstra@chello.nl
Cc: paulus@samba.org
Cc: Valdis.Kletnieks@vt.edu
LKML-Reference: <1257254925-5423-1-git-send-email-tfransosi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>