streamline and document helptext mode displays

Most commands are usable only at runtime; so don't bother saying
that, it's noise.  Moreover, tokens like EXEC are cryptic.  Be
more clear: highlight only the commands which may (also) be used
during the config stage, thus matching the docs more closely.
There are

 - Configuration commands (per documentation)
 - And also some commands that valid at *any* time.

Update the docs to note that "help" now shows this mode info.

This also highlighted a few mistakes in command configuration,
mostly commands listed as "valid at any time" which shouldn't
have been.  This just fixes ones I noted when sanity testing.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/target/cortex_m3.c b/src/target/cortex_m3.c
index edf9b6f0..556928f8 100644
--- a/src/target/cortex_m3.c
+++ b/src/target/cortex_m3.c
@@ -2003,7 +2003,7 @@ static const struct command_registration cortex_m3_command_handlers[] = {
 	},
 	{
 		.name = "cortex_m3",
-		.mode = COMMAND_ANY,
+		.mode = COMMAND_EXEC,
 		.help = "Cortex-M3 command group",
 		.chain = cortex_m3_exec_command_handlers,
 	},