For USB1 HS device certification, USB-IF TID 2980

Pull out the latest SDK from https://mcuxpresso.nxp.com/en/select, use USB MSC RAMDISK as the example under: 
\boards\lpcxpresso55s16\usb_examples\usb_device_msc_ramdisk\bm
modify usb_device_config.h as seen in this attachment.

For USB1 HS host certification, USB-IF TID 3707

Since LPC55S16 is very similar to LPC55S69, we applied Qualification by Similarity (QbS) to LPC55S69 HS embedded host,
we were informed by USB-IF only "USB 2.0 Electrical Signal Quality" is required by the test lab to be qualified for QbS.
The attached result is from Novus Labs. LPC55S16 Embedded Host is certified USB-IF which can be found based on TID info. from their 
website USB.org. 

In order run the "USB 2.0 Electrical Signal Quality", pull out the latest SDK from https://mcuxpresso.nxp.com/en/select, 
use USB Host MSD FAT File system as the example under: \boards\lpcxpresso55s16\usb_examples\usb_host_msd_fatfs\bm
modify usb_host_config.h as seen in this attachment.

We noticed that default USB HS PHY TX (0x40038010) register may fail to enumerate with certain PIDVID boards for host signal quality test, 
trimming the nominal 45O series termination resistance to the DP and DM on TX register will solve the problem.
use the attached usb_phy.c file to replace the one under "\middleware\usb\phy" directory.
