This patch just splits ucf64 instruction simulation helpers from
helper.c.
Also, two checkpatch warnings are solved.

v1->v2: adjust copyright information for new ucf64_helper.c
Signed-off-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>