BaseDynInst: Preserve the faults returned from read and write.
BaseDynInst: Preserve the faults returned from read and write.

When implementing timing address translations instead of atomic, I
forgot to preserve the faults that are returned from the read and
write calls.  This patch reinstates them.

haowu4682/gem5,haowu4682/gem5,LingxiaoJIA/gem5,LingxiaoJIA/gem5,haowu4682/gem5,haowu4682/gem5,haowu4682/gem5,haowu4682/gem5,LingxiaoJIA/gem5,haowu4682/gem5,LingxiaoJIA/gem5,haowu4682/gem5,haowu4682/gem5,LingxiaoJIA/gem5,LingxiaoJIA/gem5,LingxiaoJIA/gem5