ARM: SAMSUNG: print CPU id on probe

It's useful to get the CPU ID/rev printed during boot sometimes, so
add a line with that information. Given that the fields have moved
within the register over time, don't try to be clever and parse it --
just print the raw values for now.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Kukjin Kim <kgene@kernel.org>