KVM: arm64: Upgrade trace_kvm_arm_set_dreg32() to 64bit

A number of registers pased to trace_kvm_arm_set_dreg32() are
actually 64bit. Upgrade the tracepoint to take a 64bit value,
despite the name...

Signed-off-by: Marc Zyngier <maz@kernel.org>

KVM: arm64: Fix address truncation in traces

Owing to their ARMv7 origins, the trace events are truncating most
address values to 32bits. That's not really helpful.

Expand the printing of such values to their full glory.

Signed-off-by: Marc Zyngier <maz@kernel.org>

KVM: arm64: Move virt/kvm/arm to arch/arm64

Now that the 32bit KVM/arm host is a distant memory, let's move the
whole of the KVM/arm64 code into the arm64 tree.

As they said in the song: Welcome Home (Sanitarium).

Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200513104034.74741-1-maz@kernel.org