Revert "PCI: create function symlinks in /sys/bus/pci/slots/N/"

This reverts commit 75568f8094eb0333e9c2109b23cbc8b82d318a3c.

Since they're just a convenience anyway, remove these symlinks since
they're causing duplicate filename errors in the wild.

Acked-by: Alex Chiang <achiang@canonical.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --cc Documentation/ABI/testing/sysfs-bus-pci
Simple merge

diff --cc drivers/pci/pci-sysfs.c
Simple merge

diff --cc drivers/pci/slot.c
Simple merge