Documentation: Remove 3 byte redundant code at the head of the Documentation/zh_CN/arm/booting

Remove 3 byte redundant code at the head of
the Documentation/zh_CN/arm/booting

When I see the file Documentation/zh_CN/arm/booting using
Bless(binary Viewer),I find 3 byte redundant in it. So I
make a patch to correcting that error made by me.

Signed-off-by: Fu Wei <tekkamanninja@gmail.com>
Acked-by: Harry Wei <harryxiyou@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>