panic if module= is specified

[Luigi Capriotti <l.capriotti@xbmc.org>]

My Kernel cmdline includes module=nvidia, where nvidia.module is in 
/live and contains two lines:

filesystem.squashfs
restrictedDrivers/nvidia.ext3

and /live/restrictedDrivers/nvidia.ext3 is a proper loopfile.

This has always worked up until a recent change (I'm not able to 
pinpoint which one, though); today I tried with initramfs HEAD and init 
cannot mount the filesystems:

+ mount -t aufs -o 
noatime,dirs=/cow=rw://nvidia.ext3=rr,noxino://filesystem.squashfs=rr,noxino 
aufs /root
mount: mounting aufs on /root failed: Invalid argument

I tried removing the module= and the system boots fine, ditto if I 
rename nvidia.ext3 so that it's not found by live script.

Looking forward to your advices.

Luigi Capriotti