KVM: arm64: Add support for FFA_PARTITION_INFO_GET

KVM: arm64: Add support for FFA_PARTITION_INFO_GET

Handle the FFA_PARTITION_INFO_GET host call inside the pKVM hypervisor
and copy the response message back to the host buffers.

Signed-off-by: Sebastian Ene <sebastianene@google.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240613132035.1070360-3-sebastianene@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>