mac80211: fix build without CONFIG_PCI

Signed-off-by: Felix Fietkau <[email protected]>

package/kernel/mac80211/patches/build/101-backport-add-pci_disable_link_state-wrapper-with-ret.patch

@@ -15,7 +15,7 @@ Signed-off-by: Felix Fietkau <[email protected]>
  	(PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
  #endif
  
-+#if LINUX_VERSION_IS_LESS(5,3,0)
++#if defined(CONFIG_PCI) && LINUX_VERSION_IS_LESS(5,3,0)
 +
 +static inline int
 +LINUX_BACKPORT(pci_disable_link_state)(struct pci_dev *pdev, int state)