RISC-V: KVM: Make kvm_riscv_guest_timer_init a void function

It can never fail so convey that fact explicitly by making the function
void. Also in kvm_arch_init_vm it makes it clear that there no need
to do any cleanup after kvm_riscv_gstage_vmid_init has been called.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Anup Patel <anup@brainfault.org>

arch/riscv/include/asm/kvm_vcpu_timer.h

@@ -39,6 +39,6 @@ int kvm_riscv_vcpu_timer_init(struct kvm_vcpu *vcpu);
 int kvm_riscv_vcpu_timer_deinit(struct kvm_vcpu *vcpu);
 int kvm_riscv_vcpu_timer_reset(struct kvm_vcpu *vcpu);
 void kvm_riscv_vcpu_timer_restore(struct kvm_vcpu *vcpu);
-int kvm_riscv_guest_timer_init(struct kvm *kvm);
+void kvm_riscv_guest_timer_init(struct kvm *kvm);
 
 #endif

arch/riscv/kvm/vcpu_timer.c

@@ -214,12 +214,10 @@ void kvm_riscv_vcpu_timer_restore(struct kvm_vcpu *vcpu)
 #endif
 }
 
-int kvm_riscv_guest_timer_init(struct kvm *kvm)
+void kvm_riscv_guest_timer_init(struct kvm *kvm)
 {
 	struct kvm_guest_timer *gt = &kvm->arch.timer;
 
 	riscv_cs_get_mult_shift(&gt->nsec_mult, &gt->nsec_shift);
 	gt->time_delta = -get_cycles64();
-
-	return 0;
 }

arch/riscv/kvm/vm.c

@@ -41,7 +41,9 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 		return r;
 	}
 
-	return kvm_riscv_guest_timer_init(kvm);
+	kvm_riscv_guest_timer_init(kvm);
+
+	return 0;
 }
 
 void kvm_arch_destroy_vm(struct kvm *kvm)