Fix command-line tty-device|config parsing

Allow user to add options on both sides of the provided config argument.

For example:

 $ tio -b 9600 am64-evm -e

Before, tio only allowed adding arguments after the config argument.

Implemented as simple as possible by introducing two stage option parsing.

src/options.h

@@ -63,3 +63,4 @@ extern struct option_t option;
 
 void options_print();
 void options_parse(int argc, char *argv[]);
+void options_parse_final(int argc, char *argv[]);