MIPS: Remove duplicated include in local.h

Fix following includecheck warning:
./arch/mips/include/asm/local.h: asm/asm.h is included more than once.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Author: Yang Li

arch/mips/include/asm/local.h

@@ -8,7 +8,6 @@
 #include <asm/asm.h>
 #include <asm/cmpxchg.h>
 #include <asm/compiler.h>
-#include <asm/asm.h>
 
 typedef struct
 {