linux-headers: Update to current kvm/next

linux-headers: Update to current kvm/next

This updates kernel headers to commit 6f627b425378 ("KVM: SVM: Add module
parameter to enable SEV-SNP", 2024-05-12).  The SNP host patches will
be included in Linux 6.11, to be released next July.

Also brings in an linux-headers/linux/vhost.h fix from v6.9-rc4.

Co-developed-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@amd.com>
Message-ID: <20240530111643.1091816-3-pankaj.gupta@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>