Expose parse_line() globally.

Add new function readline_into_buffer() that allows the
output of readline to be put into a pointer to char buffer.

This refactoring allows other functions besides the
main command loop to also use the same input mechanism.

Signed-off-by: James Yang <James.Yang@freescale.com>
Acked-by: Jon Loeliger <jdl@freescale.com>
diff --git a/include/common.h b/include/common.h
index 493417f..3b5bd8c 100644
--- a/include/common.h
+++ b/include/common.h
@@ -197,6 +197,8 @@
 void	main_loop	(void);
 int	run_command	(const char *cmd, int flag);
 int	readline	(const char *const prompt);
+int	readline_into_buffer	(const char *const prompt, char * buffer);
+int	parse_line (char *, char *[]);
 void	init_cmd_timeout(void);
 void	reset_cmd_timeout(void);