docs(maintainers): add myself as SynQuacer platform co-maintainer

Add myself as co-maintainer for SynQuacer platform,
as I'm currently working on it.

Change-Id: I149830bf7f635f72df808214e8fd23730fde7212
Signed-off-by: Masahisa Kojima <kojima.masahisa@socionext.com>
1 file changed