atomisp: kill another define

We don't need an ifdef for the sake of 8-12 bytes. Avoid the ifdef added by
fde46970. Instead turn it into a single const
string array at a fixed location thereby saving even more memory.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>