linuxkpi: add pci_dev_present and an srcu function for drm5.2

[ashafer_badland.io]

Summary

These functions are needed for building drm5.2. They should not
introduce any known backwards compatability issues.

pci_dev_present shows if a set of pci ids are present in the system.
It just wraps pci_find_device.

synchronize_srcu_expedited likewise wraps the existing synchronize_src
lkpi function.

Test Plan

Tested with drm5.2 wip on Intel UHD 605.

[• hselasky]

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

1056

style: while (cur != NULL &&

1058

BSD style: return (1);

1062

Ditto.

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

52 ↗

(On Diff #71611)

Commit this change separately.

[ashafer_badland.io]

Sorry my style habits are taking a little while to form.

I'll make a new review for the srcu changes in a moment.