How to integrate the latest ath10k driver into an older kernel release ?

[Wu Chung-I]

Hi Janusz:
I follow your procedure (include patched your attachment).
I can generate but failing compile.
Any advise?
My environment is Ubuntu 16.04 (same with you), git the backports and 
checkout to master.

Log of make:
make[5]: 'conf' is up to date.
#
# configuration written to .config
#
Building backport-include/backport/autoconf.h ... done.
   CC [M]  /home/chungyi/backports-output/compat/main.o
   CC [M]  /home/chungyi/backports-output/compat/backport-4.5.o
   CC [M]  /home/chungyi/backports-output/compat/backport-4.6.o
   CC [M]  /home/chungyi/backports-output/compat/backport-4.7.o
   CC [M]  /home/chungyi/backports-output/compat/backport-4.8.o
   CC [M]  /home/chungyi/backports-output/compat/lib-rhashtable.o
scripts/Makefile.build:258: recipe for target 
'/home/chungyi/backports-output/compat/lib-rhashtable.o' failed
scripts/Makefile.build:403: recipe for target 
'/home/chungyi/backports-output/compat' failed
Makefile:1418: recipe for target 
'_module_/home/chungyi/backports-output' failed
Makefile.build:6: recipe for target 'modules' failed
Makefile.real:88: recipe for target 'modules' failed
Makefile:40: recipe for target 'modules' failed
Makefile:30: recipe for target 'default' failed
   CC [M]  /home/chungyi/backports-output/compat/lib-rhashtable.o
scripts/Makefile.build:258: recipe for target 
'/home/chungyi/backports-output/compat/lib-rhashtable.o' failed
scripts/Makefile.build:403: recipe for target 
'/home/chungyi/backports-output/compat' failed
Makefile:1418: recipe for target 
'_module_/home/chungyi/backports-output' failed
Makefile.build:6: recipe for target 'modules' failed
Makefile.real:88: recipe for target 'modules' failed
Makefile:40: recipe for target 'modules' failed
Makefile:30: recipe for target 'default' failed