usb: t6d uboot standby bringup [1/1]

PD#SWPL-197232

Problem:
need support uboot standby at trunk code;

Solution:
add usb dev_register_pm at uboot code with suspend
(systemsuspend), resume and poweroff(systemoff);

Verify:
t6d br309#01, br301#105, other chip build ok

Change-Id: I64b8ce74f445fc24e8b1c3912c81f1e5adfe6601
Signed-off-by: Chengbing Wu <chengbing.wu@amlogic.com>
4 files changed