x86/hyperv: Fix check of return value from snp_set_vmsa()

snp_set_vmsa() returns 0 as success result and so fix it.

Cc: stable@vger.kernel.org
Fixes: 44676bb9 ("x86/hyperv: Add smp support for SEV-SNP guest")
Signed-off-by: Tianyu Lan <tiala@microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/20250313085217.45483-1-ltykernel@gmail.com


Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20250313085217.45483-1-ltykernel@gmail.com>