usb: host: ehci-tegra: Remove unused fields from tegra_ehci_hcd

There are few stale fields in tegra_ehci_hcd structure, let's remove them.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200106013416.9604-21-digetx@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>