isl_scheduler.c: move up some functions
isl_scheduler.c: move up some functions

We will be able to reuse these functions from there new positions
in the next commit.

Signed-off-by: Sven Verdoolaege <e5350bbed4977f5eb8ae1dc6abd9ae59d21ace75@kotnet.org>

Distrotech/isl,inducer/isl-mirror,crossbuild/isl,evaautomation/isl,Distrotech/isl,inducer/isl-mirror,KangDroidSMProject/ISL,BenzoSM/isl,KangDroidSMProject/ISL,UBERTC/isl,Meinersbur/isl,nicolasvasilache/isl,Distrotech/isl,nicolasvasilache/isl,BenzoSM/isl,crossbuild/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,evaautomation/isl,PollyLabs/isl,Distrotech/isl,tobig/isl,simbuerg/isl,simbuerg/isl,KangDroidSMProject/ISL,crossbuild/isl,inducer/isl-mirror,Distrotech/isl,tobig/isl,abduld/isl,Meinersbur/isl,PollyLabs/isl,PollyLabs/isl,inducer/isl-mirror,abduld/isl,BenzoSM/isl,tobig/isl,UBERTC/isl,UBERTC/isl,simbuerg/isl,nicolasvasilache/isl,evaautomation/isl,Meinersbur/isl,abduld/isl,evaautomation/isl,UBERTC/isl,simbuerg/isl,crossbuild/isl,inducer/isl-mirror,BenzoSM/isl,abduld/isl,tobig/isl,PollyLabs/isl,nicolasvasilache/isl,BenzoSM/isl,simbuerg/isl,Meinersbur/isl,PollyLabs/isl,KangDroidSMProject/ISL