Blackfin: do not error if GPIO IRQ is requested already as GPIO
Some drivers expect to be able to request both as GPIO and GPIO IRQ, so allow that use case. Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com> Signed-off-by: NBryan Wu <cooloney@kernel.org> Signed-off-by: NMike Frysinger <vapier@gentoo.org>
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