UPSTREAM: arm64: cputype: Add CPU implementor & types for the Apple M1 cores

The implementor will be used to condition the FIQ support quirk.

The specific CPU types are not used at the moment, but let's add them
for documentation purposes.

Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>
(cherry picked from commit 11ecdad7)
Bug: 209777660
Signed-off-by: Will Deacon <willdeacon@google.com>
Change-Id: If84141e50dfb52258c9ecfca9979f2d77e9a5197