[qca-nss-drv] support customer crash dump.

write value not in 0/1 to /proc/sys/dev/nss/general/coredump
to disable panic when NSS FW crashes, so developers will have
a chance to collect crash dump (coredump) by using mdump utility:
see qsdk/qca/feeds/nss/mdump/src/README to details of using mdump.

Change-Id: I686ca3ff54bfa93f01f60dbdb8b2db7a3dbcda53
Signed-off-by: Guojun Jin <g.jin@codeaurora.org>
4 files changed