Unable to get gpio-cdev feature working on v0.3.0

[CSRaghunandan]

As the title suggests, v0.3.0 of linux-embedded-hal does not have gpio-cdev feature, but it is claimed to have in the documentaiton.

[ryankurte]

huh, it looks like it's in the v0.3.x branch, but not in release v0.3.0, we could probably stand to point release that. you might like to patch to linux-embedded-hal = { git = "https://github.com/rust-embedded/linux-embedded-hal", branch = "v0.3.x" } to see if that works as expected in the interim.

[CSRaghunandan]

I see. Yeah, you guys can make a point release with the cdev feature enabled.

Until then, I can use the code from 0.3.x branch.

[posborne]

Fixed by #66