Unify Local APIC address definitions

Unify Local APIC address definitions

We used several names for that same value, and hardcoded the value
at some more places.

They're all LOCAL_APIC_ADDR now (except for lapic specific code
that still uses LAPIC_DEFAULT_BASE).

Change-Id: I1d4be73b1984f22b7e84681edfadf0588a7589b6
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/676
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>