cmd: Convert existing long help messages to the new macro

- Generally we just drop the #ifdef CONFIG_SYS_LONGHELP and endif lines
  and use U_BOOT_LONGHELP to declare the same variable name as before
- In a few places, either rename the variable to follow convention or
  introduce the variable as it was being done inline before.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/cyclic.c b/cmd/cyclic.c
index 946f1d7..ad7fc3b 100644
--- a/cmd/cyclic.c
+++ b/cmd/cyclic.c
@@ -76,9 +76,9 @@
 	return 0;
 }
 
-static char cyclic_help_text[] =
+U_BOOT_LONGHELP(cyclic,
 	"demo <cycletime_ms> <delay_us> - register cyclic demo function\n"
-	"cyclic list - list cyclic functions\n";
+	"cyclic list - list cyclic functions\n");
 
 U_BOOT_CMD_WITH_SUBCMDS(cyclic, "Cyclic", cyclic_help_text,
 	U_BOOT_SUBCMD_MKENT(demo, 3, 1, do_cyclic_demo),