ARM: tegra: set CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS
Tegra's EHCI controllers only have a single PORTSC register. Configure U-Boot to know this. This prevents e.g. ehci_shutdown() from touching non-existent registers. Signed-off-by: NStephen Warren <swarren@nvidia.com> Signed-off-by: NTom Warren <twarren@nvidia.com>
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