tools: bootconfig: Fix spelling mistake "faile" -> "failed"

There are two spelling mistakes in printf statements, fix these.

Link: http://lkml.kernel.org/r/20200116092206.52192-1-colin.king@canonical.com



Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>