ASoC: pxa: magician: convert to use i2c_new_client_device()

Move away from the deprecated API and return the shiny new ERRPTR where
useful.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20200326211010.13471-2-wsa+renesas@sang-engineering.com


Signed-off-by: Mark Brown <broonie@kernel.org>