Compile time initialization is better than runtime initialization.

Remove many early_initcall()s and many trace_init_flags_##name()s.
Acked-by: NFrederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: NLai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4D3FDFFC.6030304@cn.fujitsu.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>