powerpc: ppc4xx: Add a gpio.h header file
This is required at present for device tree control. The ppc4xx does support GPIOs but does not seem to have a proper driver. So this file is empty. Signed-off-by: Simon Glass <sjg@chromium.org>utp
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/*
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* (C) Copyright 2014 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/* This is empty for now as we don't support the generic GPIO interface */
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