prjc_v6.1-r0: implicit declaration of function error

This is fixed with unsetting: CONFIG_PSI

---

CALL scripts/checksyscalls.sh
DESCEND objtool
CC kernel/sched/build_utility.o
In file included from kernel/sched/build_utility.c:99:
kernel/sched/psi.c: In function ‘psi_cgroup_restart’:
kernel/sched/psi.c:1135:17: error: implicit declaration of function ‘rq_lock_irq’; did you mean ‘rq_unlock_irq’? [-Werror=implicit-function-declaration]
1135 | rq_lock_irq(rq, &rf);
| ^~~~~~~~~~~
| rq_unlock_irq
cc1: some warnings being treated as errors
make[3]: *** [scripts/Makefile.build:250: kernel/sched/build_utility.o] Error 1
make[2]: *** [scripts/Makefile.build:500: kernel/sched] Error 2
make[1]: *** [scripts/Makefile.build:500: kernel] Error 2
make: *** [Makefile:1992: .] Error 2 \