KVM: arm64: Handle PIR{,E0}_EL2 traps

KVM: arm64: Handle PIR{,E0}_EL2 traps

Add the FEAT_S1PIE EL2 registers the sysreg descriptor array so that
they can be handled as a trap.

Access to these registers is conditional based on ID_AA64MMFR3_EL1.S1PIE
being advertised.

Similarly to other other changes, PIRE0_EL2 is guaranteed to trap
thanks to the D22677 update to the architecture.

Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241023145345.1613824-17-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>