Fix incorrect dev being passed to gpiobus_detach_bus

[devivanov_proton.me]

Summary

Passing in the busdev will not detach from the bus correctly leaving the /dev/gpiocN entry

[imp]

sys/dev/iicbus/gpio/pcf8574.c

161–162

Why test the busdev but detach dev

[devivanov_proton.me]

Remove check for busdev before detaching from gpiobus

[imp]

This looks good to me, I'm adding a reviewer.

[imp]

So @jhb and @vexeduxr what do you think? From my tracing through of things, I think this is right, but I didn't do a super deep dive.

[vexeduxr]

sys/dev/iicbus/gpio/pcf8574.c

164

Why add a newline?

[devivanov_proton.me]

Remove newline to confirm to the files format

[imp]

@vexeduxr can you include this with the other gpiobus changes you're doing? Let me know if you need any help with committing someone else's change.

[vexeduxr]

In D51857#1185208, @imp wrote:

@vexeduxr can you include this with the other gpiobus changes you're doing? Let me know if you need any help with committing someone else's change.

Sure.