This patch includes:
- XVDIV.{B/H/W/D}[U];
- XVMOD.{B/H/W/D}[U].

Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230914022645.1151356-28-gaosong@loongson.cn>