gpio: pl061: convert to use 0 for no irq
We don't want drivers using NO_IRQ, so remove its use. For now, 0 or -1 means no irq until platforms are converted to use 0. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NGrant Likely <grant.likely@secretlab.ca> Cc: Linus Walleij <linus.ml.walleij@gmail.com>
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