[mvmul] mark asm tests as @requires_xcc
[mvmul] mark asm tests as @requires_xcc

cfelton/pymtl,Glyfina-Fernando/pymtl,cornell-brg/pymtl,12yujim/pymtl,jck/pymtl,Glyfina-Fernando/pymtl,cornell-brg/pymtl,jck/pymtl,12yujim/pymtl,cfelton/pymtl,tj93/pymtl,jjffryan/pymtl,tj93/pymtl,jjffryan/pymtl,jjffryan/pymtl,12yujim/pymtl,cornell-brg/pymtl,Glyfina-Fernando/pymtl,jck/pymtl,tj93/pymtl,cfelton/pymtl