media: i2c: ds90ub960: Replace aliased clients list with address list

media: i2c: ds90ub960: Replace aliased clients list with address list

The ds90ub960 driver currently uses a list of i2c_client structs to keep
track of used I2C address translator (ATR) alias slots for each RX port.

Keeping these i2c_client structs in the alias slot list isn't actually
needed, the driver only needs to know the client address for each slot.

Convert the aliased_clients list to a list of aliased client addresses.
This will allow removing the "client" parameter from the i2c-atr callbacks
in a future patch.

Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
Acked-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>