This patch includes:
- XVPACK{EV/OD}.{B/H/W/D};
- XVPICK{EV/OD}.{B/H/W/D};
- XVILV{L/H}.{B/H/W/D}.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230914022645.1151356-54-gaosong@loongson.cn>