backports: replace netlink portid by semantic patch

backports: replace netlink portid by semantic patch

Introduce the infrastructure to apply semantic patches
and make use of it for the (frequently breaking) portid
patch for netlink.

Unfortunately this is significantly slower:

before:
real    0m14.312s
user    0m12.144s
sys     0m1.784s

after:
real    0m25.932s
user    0m21.768s
sys     0m2.932s

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>