MIPS: bootm: remove unused or redundant header files

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/lib/bootm.c

@@ -6,10 +6,7 @@
  */
 
 #include <common.h>
-#include <command.h>
 #include <image.h>
-#include <u-boot/zlib.h>
-#include <asm/byteorder.h>
 #include <asm/addrspace.h>
 
 DECLARE_GLOBAL_DATA_PTR;