Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and also it prints the error value.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
        ret = PTR_ERR_OR_ZERO(stmfx->vdd);
        if (ret == -ENODEV) {
                stmfx->vdd = NULL;
-       } else if (ret == -EPROBE_DEFER) {
-               return ret;
-       } else if (ret) {
-               dev_err(&client->dev, "Failed to get VDD regulator: %d\n", ret);
-               return ret;
+       } else {
+               return dev_err_probe(&client->dev, ret,
+                                    "Failed to get VDD regulator\n");
        }
 
        if (stmfx->vdd) {