fastboot: add cmd enter_fastboot [1/1]

PD#SWPL-197473

Problem:
add cmd enter_fastboot

Solution:
add cmd enter_fastboot

Verify:
local

Change-Id: I09567f180339449a7f987a85aed0b5c3fc047d06
Signed-off-by: Xindong Xu <xindong.xu@amlogic.com>
4 files changed