mfd: cs42l43: Increase the SoundWire attach timeout

Some SoundWire controllers take a very long time to fully power up. As
such, increase the timeout that the cs42l43 driver will wait for the
device to initially appear on the bus.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20241205115822.2371719-3-ckeepax@opensource.cirrus.com


Signed-off-by: Lee Jones <lee@kernel.org>