ENGR00221716-01 Mx6 USB host: set disconnect bit should wait for resume finished

ENGR00221716-01 Mx6 USB host: set disconnect bit should wait for resume finished

For i.MX6DLTO1.1 and i.MX6DQTO1.2, the disconnection-bit can only be set after
the resume finished, otherwise, the remote-wake-up may fail. Because if the
device not switch to High-Speed 45ohm termination resistors mode, when the
disconnection  detection bit is set the disconnection detection circuit will
detect a high speed disconnection by mistake.

Signed-off-by: make shi <b15407@freescale.com>