How to get the puc driver going on 4.4-RELEASE.

Create a directory /usr/src/sys/dev/puc and copy puc.c, pucdata.c and
pucvar.h into it.

Change to the /usr/src/sys directory.
Apply the kern.diff patch with:

patch < path_to/kern.diff

Check that there are no .rej files. (find . -name \*.rej) If there are,
fix the problems before going on.

Add a line with "device puc" to your kernel config file and rebuild your
kernel.

The specification for each card is in the file pucdata.c and will need
tweaking for new cards.
