oprofile: fixing whitespaces in arch/x86/oprofile/*

Signed-off-by: NRobert Richter <robert.richter@amd.com>

arch/x86/oprofile/backtrace.c

@@ -52,8 +52,7 @@ struct frame_head {
 	unsigned long ret;
 } __attribute__((packed));
 
-static struct frame_head *
-dump_user_backtrace(struct frame_head *head)
+static struct frame_head *dump_user_backtrace(struct frame_head *head)
 {
 	struct frame_head bufhead[2];