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: bus manager

Change-Id: Ic2a7d3a4949a06a6e5f35dbb0b43d8239f92a370
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2457
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
Reviewed-by: Rene Gollent <rene@gollent.com>