target/loongarch: Fix exception BCE missing to update CSR_BADV

Exception BCE need update CSR_BADV, and the value is env->pc.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
1 file changed