consinit().
- Fix fbconnect() and relatives; 'struct fbinfo' is initialized only once,
making sure no extraneous console resolution message is emitted.
- Make local-only function and variables static.
- Move function prototypes and extern variable declarations to
header files.
- Delete unused variables.
There's still a handful of extern declaraions that should be fixed up.
Use scc_tty_init() in scc_consinit(). Declare scc_consinit() in sccvar.h.
* Remove last vestige of special-case console handling in sccparam() code.
* Call scc_consinit() from findcons scc_serial() console-setup.
Dont PROM for scc serial console at all.