FRM_RGB: update perl-doc

git-svn-id: https://svn.code.sf.net/p/fhem/code/trunk@4173 2b470e98-0d58-463d-a4d8-8e2adae1ed80
FRM_RGB: stateFormat

git-svn-id: https://svn.code.sf.net/p/fhem/code/trunk@4174 2b470e98-0d58-463d-a4d8-8e2adae1ed80