ENGR00235630 MX6 USB :fix USB does not work when plug in device during suspend

ENGR00235630 MX6 USB :fix USB does not work when plug in device during suspend

USB does not work when plug in a usb device during system suspend. Under this
case, USB driver will be in low power mode, but WIE bit not be set if usb wake
up is not enabled.So there are only ID change interrupt no USB wakeup interrupt
after system resume.In current bsp, after system resume ID change status not be
clear,and ID change interrupt will continue happen, which cause the system busy.
No checking WIR bit if ID change interrupt happen when USB in low power mode to
fix this issue.

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