a10_gpio: Don't do read/set dance if pin is already configured for output
This fixes some regulator issues with a83t/BananaPi-M3; the pin value was
getting clobbered as we reconfigured the pin when initializing the
regulator.
Discussed with: ian
a10_gpio: Don't do read/set dance if pin is already configured for output Tags None Referenced Files None Subscribers None
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