cmd: Make use of U_BOOT_LONGHELP when missing

After adding the U_BOOT_LONGHELP macro some new commands came in still
that were not making use if it. Switch these cases over and in a few
places add missing newlines as well.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/cmd/cli.c b/cmd/cli.c
index be3bf7d..e0ddd0a 100644
--- a/cmd/cli.c
+++ b/cmd/cli.c
@@ -118,16 +118,11 @@
 	return CMD_RET_USAGE;
 }
 
-#if CONFIG_IS_ENABLED(SYS_LONGHELP)
-static char cli_help_text[] =
+U_BOOT_LONGHELP(cli,
 	"get - print current cli\n"
-	"set - set the current cli, possible value are: old, modern"
-	;
-#endif
+	"set - set the current cli, possible value are: old, modern\n");
 
 U_BOOT_CMD(cli, 3, 1, do_cli,
 	   "cli",
-#if CONFIG_IS_ENABLED(SYS_LONGHELP)
 	   cli_help_text
-#endif
 );