We have calculated VMLINUZ_LOAD_ADDRESS in shell, which is indecipherable. This
patch rewrites it in C.

Signed-off-by: Wu Zhangjin
To: linux-mips
Cc: Alexander Clouter
Cc: Manuel Lauss
Cc: Sam Ravnborg
Acked-by: Sam Ravnborg
Reviewed-by: Alexander Clouter
Patchwork: https://patchwork.linux-mips.org/patch/1324/
Signed-off-by: Ralf Baechle