Fix Kinetis USB disconnect

When disconnecting in the middle of a setup packet USB stops working
even after being re-connected. This is because the setup packet
suspended endpoint events but nothing resumed endpoint events.
This patch adds code to resume endpoint events in the reset handler.

usb/device/targets/TARGET_Freescale/USBPhy_Kinetis.cpp

@@ -565,6 +565,7 @@ void USBPhyHw::process()
 
         Data1 = 0x55555555;
         USB0->CTL |=  USB_CTL_ODDRST_MASK;
+        USB0->CTL &= ~USB_CTL_TXSUSPENDTOKENBUSY_MASK;
 
         USB0->ISTAT   =  0xFF;  // clear all interrupt status flags
         USB0->ERRSTAT =  0xFF;  // clear all error flags