PCI/pwrctrl: generic: Simplify dev_err_probe() usage

PCI/pwrctrl: generic: Simplify dev_err_probe() usage

dev_err_probe() returns the error code passed to it, so this:

  dev_err_probe(dev, ret, "Failed to get slot regulators\n");
  return ret;

is equivalent to this:

  return dev_err_probe(dev, ret, "Failed to get slot regulators\n");

Simplify by using the latter.

Suggested-by: Bartosz Golaszewski <brgl@kernel.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260220-topic-sm8650-ayaneo-pocket-s2-base-v5-2-1ad79caa1efa@linaro.org