`opcode` is wrote twice.
Fixes CID 1490798: Incorrect expression (EVALUATION_ORDER).
Fixes: 8a5f2228db ("broadcom/qpu: add new lookup opcode description helper")
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12554>