KVM: arm64: vgic-v3: Add misc Group-0 handlers

BugLink: https://bugs.launchpad.net/bugs/1673564
A number of Group-0 registers can be handled by the same accessors
as that of Group-1, so let's add the required system register encodings
and catch them in the dispatching function.

Tested-by: Alexander Graf <agraf@suse.de>
Acked-by: David Daney <david.daney@cavium.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
(backported from commit eab0b2dc4f6f34147e3d10da49ab8032e15dbea0)
[ dannf: Drop the SYS_ prefix and move the system register macro
  definitions from asm/sysreg.h to asm/arch_gicv3.h for consistency
  with code prior to 0e9884fe ]
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>