Stop using builtin_run_command()

Boards can select either the 'built-in' parser or the hush parser. We
should not call builtin_run_command() if we are using the hush parser.
We use run_command() instead, since it knows how to call the correct
parser.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>

include/common.h

@@ -260,7 +260,6 @@ int	print_buffer (ulong addr, void* data, uint width, uint count, uint linelen);
 
 /* common/main.c */
 void	main_loop	(void);
-int builtin_run_command(const char *cmd, int flag);
 int run_command(const char *cmd, int flag);
 int	readline	(const char *const prompt);
 int	readline_into_buffer(const char *const prompt, char *buffer,