KVM: x86/mmu: Plumb "sp" _pointer_ into the TDP MMU's handle_changed_spte()

KVM: x86/mmu: Plumb "sp" _pointer_ into the TDP MMU's handle_changed_spte()

Plumb the "sp" pointer into handle_changed_spte() to allow checking of
is_mirror_sp(sp) in handle_changed_spte().  This will allow consolidating
all S-EPT updates into a single kvm_x86_ops hook.

[Yan: Remove unused "as_id" param in tdp_mmu_set_spte() ]

Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Link: https://patch.msgid.link/20260509075622.4258-1-yan.y.zhao@intel.com
Signed-off-by: Sean Christopherson <seanjc@google.com>