misc: mic: scif: fix potential double free of scif_dev
_scif_init() free scif_dev in the free_sdev erro path, but _scif_exit will free it again when module exit, it cause BUG_ON issue, kernel BUG at mm/slub.c:3944! invalid opcode: 0000 [#1] SMP KASAN PTI Set scif_dev to NULL in scif_destroy_scifdev() to fix it. Cc: Sudeep Dutt <sudeep.dutt@intel.com> Cc: Ashutosh Dixit <ashutosh.dixit@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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