mwifiex: add /sys/kernel/debug/mwifiex/*/crash, to simulate crashes

For our first test case, just simulate a device disconnect/reconnect to make
it easier to check this code for race conditions, null pointers, etc...

backports-0400-mwifiex-crash-sim.patch

Change-Id: Ie8df70e2827771465c9a9ed0e1957320773f8983
1 file changed