tools kvm headers: Update KVM headers from the kernel sources

To pick the changes from:

  8d14797b ("KVM: arm64: Move 'struct kvm_arch_memory_slot' out of uapi/")

That don't causes any changes in tooling, only addresses this perf build
warning:

  Warning: Kernel ABI header at 'tools/arch/arm64/include/uapi/asm/kvm.h' differs from latest version at 'arch/arm64/include/uapi/asm/kvm.h'
  diff -u tools/arch/arm64/include/uapi/asm/kvm.h arch/arm64/include/uapi/asm/kvm.h

Cc: Marc Zyngier <maz@kernel.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/arch/arm64/include/uapi/asm/kvm.h

@@ -156,9 +156,6 @@ struct kvm_sync_regs {
 	__u64 device_irq_level;
 };
 
-struct kvm_arch_memory_slot {
-};
-
 /*
  * PMU filter structure. Describe a range of events with a particular
  * action. To be used with KVM_ARM_VCPU_PMU_V3_FILTER.