Rename cpu/x86/car.h to arch/early_variables.h

and add an ARMv7 version.

Change-Id: I14fbff88d7c2b003dde57a19bf0ba9640d322156
Signed-off-by: Stefan Reinauer <reinauer@google.com>
[km: rebased fa004acf8 from chromium git]
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3939
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)

src/cpu/x86/lapic/apic_timer.c

@@ -24,7 +24,7 @@
 #include <thread.h>
 #include <arch/io.h>
 #include <arch/cpu.h>
-#include <cpu/x86/car.h>
+#include <arch/early_variables.h>
 #include <cpu/x86/msr.h>
 #include <cpu/x86/lapic.h>
 #include <cpu/intel/speedstep.h>