usb: usb-uclass.c: Drop le16_to_cpu() as values are already swapped

These values are already swapped to CPU endianess, so swapping them
again is a bug. Let's remove the swap here instead.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Marek Vasut <marex@denx.de>