linuxrc: remove bogus comments
linuxrc: move splash initialization to splash_init()
linuxrc: move modules initialization code to modules_init
linuxrc: move REAL_ROOT* setup to setup_real_root()
linuxrc: move the devmgr initialization code to devmgr_init()
linuxrc: simplify iscsi setup code
linuxrc: trivial, use a more compact syntax