pkeys boot param fix

Quirky 006 testers have reported that the 'pkeys' boot parameter causes an error message at bootup.

I found that the device node /dev/tty0 was missing from the initramfs, which caused 'loadkmap' and 'loadfont' utilities to fail. I also found that tty1 to tty4 were all the same minor device number, so I fixed that too.

This was a Woof bug.

Tags: woof