memory: emif: remove unneeded ENOMEM error messages

Memory subsystem already prints message about failed memory
allocation, there is no need to do it in the drivers.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220304082339.230938-1-krzysztof.kozlowski@canonical.com