linux-wandboard

ENGR00276811 mx6-msl: usb: add 2ns delay between clear PHY CLKGATE and PHY_PWD

It can fix the bugs that there is no SOF after resume sometimes.
Without SOF after resume the device will go to suspend again,
and host assumes it is disconnected and sends reset later.

Signed-off-by: Peter Chen <peter.chen@freescale.com>