PCI/pwrctrl: Move pci_pwrctrl_is_required() earlier in file

PCI/pwrctrl: Move pci_pwrctrl_is_required() earlier in file

Move pci_pwrctrl_is_required() earlier in the file so it can be used by
pci_pwrctrl_power_off_device() and pci_pwrctrl_power_on_device().

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
[bhelgaas: split to its own patch]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260421104102.12322-1-manivannan.sadhasivam@oss.qualcomm.com