Refactor main loop in preparation of libflashrom

To prepare for libflashrom I wanted to make the main loop more readable and more correct and factor out stuff which can be useful in libflashrom.

- Factor out printing of supported devices to print.c.
- Adjust name of wiki printing function to fit the pattern.
- Abort if the user specified --verify and --noverify at the same time.
- Check for extra parameters which don't fit commandline syntax.

Corresponding to flashrom svn r766.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Stefan Reinauer <stepan@coresystems.de>

print_wiki.c

@@ -539,7 +539,7 @@ void print_supported_pcidevs_wiki(struct pcidev_status *devs)
 	}
 }
 
-void print_wiki_tables(void)
+void print_supported_wiki(void)
 {
 	time_t t = time(NULL);