UPSTREAM: KVM: arm64: Change the return type of kvm_vcpu_preferred_target()

kvm_vcpu_preferred_target() always return 0 because kvm_target_cpu()
never returns a negative error code.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211105011500.16280-1-yuehaibing@huawei.com


(cherry picked from commit 08e873cb)
Bug: 204960018
Signed-off-by: Will Deacon <willdeacon@google.com>
Change-Id: I39e83529eff560f692853be9e9aba8d6200a824c