Léo Lam 80b1bf13c2 IOS: Change devices to always return IPCCommandResult
This commit changes devices to always return IPCCommandResult rather
than just a return code for Open() and Close() in order to be able
to better emulate reply timing.

In hindsight, I should have considered we would want to emulate
timing when I cleaned up the device interface, but alas.
This rectifies that mistake.
2018-02-27 21:12:07 +01:00
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