isl_map.c: directly include required header
isl_map.c: directly include required header

Do so instead of relying on this header getting included indirectly.

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

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