usb/xhci: Add support for EHSET tests for host compliance

USB2 specification defines following test modes for host electrical
compliance: TEST_J/K/SE0_NAK and TEST_PACKET. Add support for these.

CRs-Fixed: 442654
Change-Id: Ifb2132abcb16cd81c2a73a7d220143f65652b325
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
1 file changed