bpf: Fix jit blinding with new sdiv/smov insns

Handle new insns properly in bpf_jit_blind_insn() function.

Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20230728011225.3715812-1-yonghong.song@linux.dev


Signed-off-by: Alexei Starovoitov <ast@kernel.org>