Fix formatting issues in the registry parsing script

This removes a couple extraneous periods from the header and
updates the std::array notation with the type and size so it
will build correctly.

Tested:
Ran the script and it produced the same output as the current
base message registry header file.

Change-Id: I19908a6a5fbbafbfe84a6f8364b175bfc470d715
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>