LinuxKPI: Check the devclass of the parent device in dev_is_pci

Reviewed by:	bz
Fixes:		c41d83548b ("LinuxKPI: pci.h add more defines and functions")
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D57066

sys/compat/linuxkpi/common/include/linux/pci.h

@@ -399,8 +399,8 @@ int _lkpi_pci_enable_msi_range(struct pci_dev *pdev, int minvec, int maxvec);
 static inline bool
 dev_is_pci(struct device *dev)
 {
-
-	return (device_get_devclass(dev->bsddev) == devclass_find("pci"));
+	return (device_get_devclass(device_get_parent(dev->bsddev)) ==
+	    devclass_find("pci"));
 }
 
 static inline uint16_t