Get rid of missing firmware warnings

[Pierre Tomon <pierretom2@laposte.net>]

Hello,

Each time the initrd get updated I got warnings about missing Nvidia firmware:
...
W: Possible missing firmware /lib/firmware/nvidia/gm20b/acr/bl.bin for module nouveau
...

Is there a way to get rid of this without installing the "firmware-misc-nonfree"
package or to blacklist the module?

Regards,

Pierre T.