interconnect: core: Simplify with dev_err_probe()

Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and the error value gets printed.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200902172433.1138-1-krzk@kernel.org


Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>