arm64: Handle virtio endianness reset when running nested When running an EL2 guest, we need to make sure we don't sample SCTLR_EL1 to work out the virtio endianness, as this is likely to be a bit random. Reviewed-by: Sascha Bischoff <sascha.bischoff@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Will Deacon <will@kernel.org>