linuxkpi: Define pci_reset_function() in <linux/pci.h>
Currently, it always returns an error on FreeBSD.
Reviewed by: bz manu
Approved by: bz manu
Differential Revision: https://reviews.freebsd.org/D37366
(cherry picked from commit 86a1c5d1294579d6787811a5d9cde2aad2567cd9)