profiling: fix !procfs build

fix:

 kernel/built-in.o: In function `profiling_store':
 ksysfs.c:(.text+0x1f90c): undefined reference to `create_proc_profile'
Signed-off-by: NIngo Molnar <mingo@elte.hu>

include/linux/profile.h

@@ -37,7 +37,14 @@ extern int prof_on __read_mostly;
 /* init basic kernel profiler */
 int profile_init(void);
 int profile_setup(char *str);
+#ifdef CONFIG_PROC_FS
 int create_proc_profile(void);
+#else
+static inline int create_proc_profile(void)
+{
+	return 0;
+}
+#endif
 void profile_tick(int type);
 
 /*