renamed button_type_t to sccp_config_buttontype_t (chan_sccp_enums.hh). removed sccp_diff_t and light_t enums.

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4726 43c1dc8c-776e-4df2-8ef1-6e829299be21