arm64: Add part number for Neoverse N1

[ Upstream commit 0cf57b86859c49381addb3ce47be70aadf5fd2c0 ]

New CPU, new part number. You know the drill.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>