msm: npu: Don't poll status register if watchdog is triggered

Once NPU watchdog is triggered, polling status register must
time out. So it's not needed to keep polling status register in
this scenario.

Change-Id: Id0513c47d0a0812e3e82c2dd03b5ce5075b3f183
Signed-off-by: Da Hoon Pyun <dpyun@codeaurora.org>