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/bloblist.c b/cmd/bloblist.c
index 21e7ff6..26548ec 100644
--- a/cmd/bloblist.c
+++ b/cmd/bloblist.c
@@ -29,11 +29,9 @@
 	return 0;
 }
 
-#ifdef CONFIG_SYS_LONGHELP
-static char bloblist_help_text[] =
+U_BOOT_LONGHELP(bloblist,
 	"info   - show information about the bloblist\n"
-	"bloblist list   - list blobs in the bloblist";
-#endif
+	"bloblist list   - list blobs in the bloblist");
 
 U_BOOT_CMD_WITH_SUBCMDS(bloblist, "Bloblists", bloblist_help_text,
 	U_BOOT_SUBCMD_MKENT(info, 1, 1, do_bloblist_info),