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dt-bindings: usb: Drop duplicate nvidia,tegra20-ehci.txt

The nvidia,tegra20-ehci binding is already documented in
ci-hdrc-usb2.yaml, so drop the old text binding.

Signed-off-by: "Rob Herring (Arm)" <robh@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250807214351.4172243-1-robh@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

authored by

Rob Herring (Arm) and committed by
Greg Kroah-Hartman 73881244 186e8f2b

-23
-23
Documentation/devicetree/bindings/usb/nvidia,tegra20-ehci.txt
··· 1 - Tegra SOC USB controllers 2 - 3 - The device node for a USB controller that is part of a Tegra 4 - SOC is as described in the document "Open Firmware Recommended 5 - Practice : Universal Serial Bus" with the following modifications 6 - and additions : 7 - 8 - Required properties : 9 - - compatible : For Tegra20, must contain "nvidia,tegra20-ehci". 10 - For Tegra30, must contain "nvidia,tegra30-ehci". Otherwise, must contain 11 - "nvidia,<chip>-ehci" plus at least one of the above, where <chip> is 12 - tegra114, tegra124, tegra132, or tegra210. 13 - - nvidia,phy : phandle of the PHY that the controller is connected to. 14 - - clocks : Must contain one entry, for the module clock. 15 - See ../clocks/clock-bindings.txt for details. 16 - - resets : Must contain an entry for each entry in reset-names. 17 - See ../reset/reset.txt for details. 18 - - reset-names : Must include the following entries: 19 - - usb 20 - 21 - Optional properties: 22 - - nvidia,needs-double-reset : boolean is to be set for some of the Tegra20 23 - USB ports, which need reset twice due to hardware issues.