LinuxKPI: remove duplicate include
Remove a duplicate bus.h include from pci.h.
Sponsored by: The FreeBSD Foundation
Approved by: re (gjb)
(cherry picked from commit fbedd9d708d06e3cc064d9e6f053649c0cf30c9c)
(cherry picked from commit a8c3d6b71645b6b16715b3a07013779b296e7ca7)