usb: dw: Add Quark SE USB device controller driver

Quark SE USB device (Designware IP) controller driver implements
the low level control routines to deal directly with the hardware.
Only FIFO mode supported.

Change-Id: I086186df017734579f0363ed79effc1481ff32c2
Signed-off-by: Adrian Bradianu <adrian.bradianu@windriver.com>
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>