vl: remove vl from CSR, assign it to vl which store in regfiles

[XiangShanRobot]

[Generated by IPC robot] commit: 9de2f3e5d16eb62d82108cdbb25003dab15784ab	commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
9de2f3e	1.808	0.447	2.043	1.187	2.938	2.508	2.197	0.921	1.369	1.441	3.454	2.658	2.399	2.932

master branch:	commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
26c1abd			2.039					0.930	1.378
fd3aa05			2.040	1.187				0.930	1.378	1.441	3.428			2.932
1b0de92	1.808	0.447	2.043	1.187	2.938	2.508	2.197	0.921	1.369	1.441	3.454	2.658	2.399	2.932
d8a998b	1.808	0.447	2.043	1.187	2.938	2.508	2.197	0.921	1.369	1.441	3.454	2.658	2.399	2.932
ee8d1f1	1.808	0.447	2.043	1.187	2.938	2.508	2.197	0.921	1.369	1.441	3.454	2.658	2.399	2.932
fcec058	1.808	0.447	2.043	1.187	2.938	2.508	2.197	0.921	1.369	1.441	3.454	2.658	2.399	2.932
0fbf39a	1.808	0.447	2.043	1.187	2.938	2.508	2.197	0.921	1.369	1.441	3.454	2.658	2.399	2.932

[Tang-Haojin]

Let me rebase it on master an run simv ci.