USB: ehci-tegra: add probing through device tree
Rely on platform_data being passed through auxdata for now; more elaborate bindings for phy config and tunings to be added. v2: moved vbus-gpio check to the helper function, added check for !of_node, added usb2 clock to board-dt table. Signed-off-by: NOlof Johansson <olof@lixom.net> Cc: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: NGrant Likely <grant.likely@secretlab.ca>
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