[PATCH v2] usb: Correct dependencies around USB_EMUL

[Marek Vasut]

On 3/23/26 3:38 PM, Tom Rini wrote:
> The symbol USB_EMUL is how sandbox has access to USB. It's
> implementation however enforces a few other requirements. It must have
> SCSI enabled, and in turn that means it must have BLK enabled. Finally,
> we should not be using SANDBOX itself as a symbol to decide what to
> build or not build here, as SANDBOX is selected for COMPILE_TEST builds
> as well and so may not have enabled the sandbox specific USB support.
> 
> Signed-off-by: Tom Rini <trini at konsulko.com>
Reviewed-by: Marek Vasut <marek.vasut+usb at mailbox.org>