Update Board name, change TARGET_OTA_ASSERT_DEVICE

Change-Id: I9ff6b4c11082ea94b7e6eba9e91481a733082ffe
Update Device Description in README File

Change-Id: I96d565856f7de1482bb5688789a191c5a5263b7c
clean up

Change-Id: I4dbbc81dd5c094160b808cbe9d48e92e0477cc32