usb/host:Enter runtime_suspend without 500ms delay when otg state == A_HOST

usb/host:Enter runtime_suspend without 500ms delay when otg state == A_HOST
 || otg state == A_WAIT_B_CON

BZ: 36969

Enter runtime_suspend without delay in runtime_idle to prevent port change happens
during 500ms delay.
If during 500ms delay, devices like mouse connect to port, this event can not process
for driver also enter runtime suspend.

Change to submit to R3-Stable.

Change-Id: I5286c0b69ca667a4a40052a273e014bfc3ad2fcb
Signed-off-by: jianqian <jianqiang.tang@intel.com>
Reviewed-on: http://android.intel.com:8080/51382
Reviewed-by: Meng, Zhe <zhe.meng@intel.com>
Tested-by: Meng, Zhe <zhe.meng@intel.com>
Reviewed-by: Tang, Richard <richard.tang@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>