Fixing low-speed USB keyboard detection

[Marek Vasut]

On 2/26/20 12:04 PM, Soeren Moch wrote:
> Adding Marek as USB maintainer. Otherwise this non-patch-email may get
> lost when sent to the mailing list only.

Well, can you send these as proper patches ?

> Soeren
> 
> On 25.02.20 18:45, Stefan wrote:
>> Hello!
>>
>> I own a D-Link DBT-120 Bluetooth Adapter, which has a CSR firmware running in a so called “HID proxy mode”. This firmware pretends to be a USB keyboard (and mouse) and thus allows to use a Bluetooth keyboard in U-Boot.
>>
>> Unfortunately it acts as a low-speed device and there seems to be some well known troubles about low-speed USB keyboards. There is a FAQ entry for openSUSE about this: https://en.opensuse.org/HCL:Raspberry_Pi3#I_cannot_use_keyboard_in_U-Boot_and_Grub_but_it_works_in_Linux
>>
>> I spend some effort to solve this issue. There are three tiny changes to get my Bluetooth keyboard working reliably as a low-speed USB keyboard.
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