+. remove "asm/war.h" since R10000_LLSC_WAR became a config option

+. clean up
Suggested-by: NMaciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: NHuang Pei <huangpei@loongson.cn>
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>