msm: npu: Auto PIL update

Load_network command is not allowed to be interrupted by signal.
And if there is an error, unload_network command needs to be
sent to fw, otherwise FW can't enter sleep mode properly.

Change-Id: I95ac7842e174096de8bcacaf594b0a91f8044f73
Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>