In drivers/usb/core/usb.c we already have le16_to_cpus() conversion
just after usb_get_descriptor():

    390     /* correct le values */
    391     le16_to_cpus(&dev->descriptor->bcdUSB);
    392     le16_to_cpus(&dev->descriptor->idVendor);
    393     le16_to_cpus(&dev->descriptor->idProduct);
    394     le16_to_cpus(&dev->descriptor->bcdDevice);

so no additional idVendor/idProduct descriptor fields
le16_to_cpu() conversion is needed after that.

On the big-endian machines extra le16_to_cpu() conversion
leads to wrong idVendor/idProduct USB device parameters values
(e.g. see devinfo <usb-device> output), and to a much more
serious problem: idVendor/idProduct-based USB device detection
does not work.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>