[PATCH] kvm: fix boolreturn.cocci warnings

[Peter Zijlstra]

On Tue, May 25, 2021 at 01:59:40PM +0800, kernel test robot wrote:
> From: kernel test robot <lkp at intel.com>
> 
> arch/arm64/kvm/mmu.c:1203:9-10: WARNING: return of 0/1 in function 'kvm_age_gfn' with return type bool
> arch/arm64/kvm/mmu.c:1173:9-10: WARNING: return of 0/1 in function 'kvm_set_spte_gfn' with return type bool
> arch/arm64/kvm/mmu.c:1216:9-10: WARNING: return of 0/1 in function 'kvm_test_age_gfn' with return type bool
> arch/arm64/kvm/mmu.c:1159:9-10: WARNING: return of 0/1 in function 'kvm_unmap_gfn_range' with return type bool
> 
>  Return statements in functions returning bool should use
>  true/false instead of 1/0.
> Generated by: scripts/coccinelle/misc/boolreturn.cocci

Per 2b076054e524 ("remove boolinit.cocci"), I have a very dim view of
this sort of thing.

> Fixes: 63b3f96e1a98 ("kvm: Select SCHED_INFO instead of TASK_DELAY_ACCT")

*how* ?!?