SW: drop firmware-ipw2x00 from GRMLBASE

This is crap:

| Unpacking firmware-ipw2x00 (from .../firmware-ipw2x00_0.36_all.deb) ...
|
| firmware-ipw2x00 agree question could not be asked
| try 'dpkg-reconfigure debconf' to select a frontend other than noninteractive
|
| dpkg: error processing /var/cache/apt/archives/firmware-ipw2x00_0.36_all.deb (--unpack):
|  subprocess new pre-installation script returned error exit status 2