mfd: arizona: Downgrade type mismatch messages to dev_warn

If the declared codec type doesn't match the detected type
we issue a log message but carry on registering the device,
so a dev_warn() is appropriate rather than a dev_err()

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>