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>

cmd/font.c

@@ -79,12 +79,10 @@ static int do_font_size(struct cmd_tbl *cmdtp, int flag, int argc,
 }
 
 
-#ifdef CONFIG_SYS_LONGHELP
-static char font_help_text[] =
+U_BOOT_LONGHELP(font,
 	"list       - list available fonts\n"
 	"font select <name> [<size>] - select font to use\n"
-	"font size <size> - select font size to";
-#endif
+	"font size <size> - select font size to");
 
 U_BOOT_CMD_WITH_SUBCMDS(font, "Fonts", font_help_text,
 	U_BOOT_SUBCMD_MKENT(list, 1, 1, do_font_list),