Remove unnecessary code and make use of generic implementations for
bus_alloc_resource(), bus_release_resource() and bus_set_resource()
(bus_generic_rl_alloc_resource(), bus_generic_rl_release_resource() and
bus_generic_rl_set_resource() respectively).

Do not print the resources for nomatch devices.

Use the inherited method for bus_get_resource_list() on ofw_iicbus.c.

Submitted by: jhb and Michal Meloun (D2033)