Judging from the member of enable_msi white-list, Nvidia controller
seems to cause troubles with MSI enabled, e.g. boot hang up or other
serious issue may come up.  It's safer to disable MSI as default for
Nvidia controllers again for now.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Cc: <stable@kernel.org>