replacing umlaute and fixing address in headers Haldeneggsteig -> Universitaetsstrasse

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

Initial AArch64/ARMv8 skeleton.

This includes enough code and definitions to generate all *.depend files for
AArch64/ARMv8 and to build a mostly empty cpu driver for the Applied Micro
X-Gene 1 (apm88xxxx) SoC.

Note: the definitions should be taken with a large grain of salt, some of them
are not updated for AArch64/ARMv8.

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>