Add Sparc support in alsaconf

Add Sparc support in alsaconf

I created the patch below against 1.0.10rc2 to make alsaconf work
for the Sparc and architectures.
It has been reviewed on the debian-sparc mailing list
(see http://lists.debian.org/debian-sparc/2005/10/msg00098.html).
I do not have positive confirmation it will work for the AMD7930
chip yet, but I expect it to. The other 2 chips have been tested
and work okay.

One of the feedbacks was that 'modprobe -a -l' is depreciated and
thus should be avoided (see the modprobe manpage), so I have taken
the oportunity to replace all use of this with a find equivalent.

Signed-off-by: Martin Habets <errandir_news@mph.eclipse.co.uk>