API for external applications.

This is an API for external (standalone) applications running on top of
U-Boot, and is meant to be more extensible and robust than the existing
jumptable mechanism. It is similar to UNIX syscall approach. See api/README
for more details.

Included is the demo application using this new framework (api_examples).

Please note this is still an experimental feature, and is turned off by
default.

Signed-off-by: Rafal Jaworowski <raj@semihalf.com>

include/common.h

@@ -279,6 +279,9 @@ int	misc_init_r   (void);
 /* common/exports.c */
 void	jumptable_init(void);
 
+/* api/api.c */
+void	api_init (void);
+
 /* common/memsize.c */
 long	get_ram_size  (volatile long *, long);