Zvks Extension

5 instructions and 0 pseudo-instructions in the Zvks extension.

• vsm3c.vi - Vector SM3 compression with immediate
• vsm3me.vv - Vector SM3 message expansion
• vsm4k.vi - Vector SM4 key schedule with immediate
• vsm4r.vs - Vector SM4 round function with scalar
• vsm4r.vv - Vector SM4 round function