USB: core: Avoid second reset during HSET Test device enumeration

During enumeration of a device, USB core first resets parent
HUB's port then issues a GetDescriptor request. After this USB
core again issues a RESET followed by SetAddress and
GetDescriptor requests.
Some HSET Test devices, needed for USB-IF host compliance tests,
fail to enumerate due to change in speed after second reset.
Hence, avoid issuing a second RESET while dealing with a HSET
Test device.

Change-Id: I4084da5381677050c785b7d11763db9b3f5635a8
CRs-Fixed: 269265
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>