nubus: Drop noop match function

nubus_bus_match() returned 1 unconditionally. This is equivalent to
no match function at all. (See driver_match_device() which does:

	return drv->bus->match ? drv->bus->match(dev, drv) : 1;

.)

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Finn Thain <fthain@linux-m68k.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230313180848.2770504-1-u.kleine-koenig@pengutronix.de


Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>