[PATCH v2 3/8] RISC-V: Add Zfhmin/Zhinxmin (with refactoring)

[Kito Cheng]

> +{"fmv.h",      0, INSN_CLASS_ZFH_OR_ZHINX,   "D,U",       MATCH_FSGNJ_H, MASK_FSGNJ_H, match_rs1_eq_rs2, INSN_ALIAS },
Maybe we need one more alias for ZFHMIN? like this: {"fmv.h",      0,
INSN_CLASS_ZFHMIN,   "D,U",       MATCH_FSGNJ_S, MASK_FSGNJ_S,
match_rs1_eq_rs2, INSN_ALIAS },

---
Spec say:
Zfhmin does not include the FSGNJ.H instruction, because it suffices to
instead use the FSGNJ.S instruction to move half-precision values between
floating-point registers.