w1: Drop allocation error message

Drop the custom error message because kzalloc() already prints
allocation failures.

Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Link: https://lore.kernel.org/r/20240527134946.338398-2-thorsten.blum@toblux.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>