net/ncsi: Disable the ncsi work before freeing the associated structure

The work function can run after the ncsi device is freed, resulting
in use-after-free bugs or kernel panic.

Fixes: 2d283bdd ("net/ncsi: Resource management")
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://patch.msgid.link/20240925155523.1017097-1-eajames@linux.ibm.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>