Enhancement: Added support for SPA509G (Skinny Type reported by Riten Jaiswal)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5585 43c1dc8c-776e-4df2-8ef1-6e829299be21
Reversion: revision 5526 partially (Reported by Antonio/Sharan on 2014-07-01).

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5586 43c1dc8c-776e-4df2-8ef1-6e829299be21