i2c: add acquire_bus/release_bus hooks

Change-Id: I9f55bb824f264175ae5830a2853a1897e3a00139
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2470
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

i2c: interfaces for busses, bus_manager, peripherals.

Change-Id: I9c3e92cb1c1833eaadc73fa30fc8757c14c79292
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2455
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>