Generalize script to select the correct board data file to load into the
wireless chip depending on the Regulatory Domain configuration whether it
is a variation of 'bdwlan30.bin' or 'fakeboar.bin'.
If 'bdwlan30_US.bin' or 'bdwlan30_World.bin' files are found in the firmware
directory, the script will create two symlinks, 'bdwlan30.bin and 'utfbd30.bin',
pointing to either one of those files.
If no 'bdwlan30_*.bin' files are found, but 'fakeboar_US.bin' or
'fakeboar_World.bin' is, it will create a single symlink, 'fakeboar.bin',
pointing to either one of those files. In the case a QCA6574 community driver
is loaded, 'board.bin' symlink will be updated.
If no 'fakeboard_*.bin' files are found either, the script will exit.
https://jira.digi.com/browse/DEL-6773
Signed-off-by: Gonzalo Ruiz <Gonzalo.Ruiz@digi.com>