msm: npu: fix network and misc commands race condition problem

misc command doesn't do npu_init before sending to firmware, so
it's possible that npu will be turned off while npu firmware is
handling misc commands which causes times out in host driver.
To fix this issue, npu_init/npu_deinit need to be called before
and after misc commands are handled. In addition, only one misc
command should be handled at any moment. The misc command should
be failed right away while the other one is being handled.

Change-Id: I523255da15fa4e3b8b21d74b28f90d3458ebeb3c
Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>