We are getting rid of the "zio-" prefix in all file names.  The prefix
is needed module names (so all single-file devices triggers and
buffers) but not in component files. This simplifies stuff a little
for our command lines and tab completion.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Federico Vaga <federico.vaga@gmail.com>