ENGR00241582 MX6 USB host: USB host certification patch

ENGR00241582 MX6 USB host: USB host certification patch

The patch include:
- USB test mode on hub port and Root-hub port
- support 3 types of message:
	too much hub ties for hub attachment
	too much power consumption for device attachment
	unsupported device class warning
- support menuconfig select the FSL_USB_TEST_MODE, located in:
 	-> Device Drivers
	   -> USB support (USB_SUPPORT [=y])
	   	 -> FSL High-speed Electrical Test Mode support

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