NSH initialization now calls boardctl(BOARDIOC_INIT) instead of...

NSH initialization now calls boardctl(BOARDIOC_INIT) instead of board_app_initaliaze.  Modify all configurations:  Make sure that CONFIG_LIB_BOARDCTL=y appears wherever CONFIG_NSH_ARCHINIT=y appears.  Remove support for CONFIG_NSH_ARCHMAC.  It is not used and there are better ways to do that operation