Wield battle axe at ARM port

This patch unfortunately incorporates a number of changes,
all of which are making future ARM ports easier.

 - drop cruft that came in with u-boot
 - move serial console from mainboard Kconfig to Exynos Kconfig
 - factor out non-board specific wakeup code
 - move generic bootblock code from mainboard to Exynos
 - actually call arch_cpu_init()
 - remove dead code
 - fix up copyright messages
 - remove snow_ prefix from a lot of code to reduce the noise
   when creating a new mainboard based on that code.

Change-Id: Ic05326edf5a7e1a691c5ff841a604cb9e351b562
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3640
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/cpu/samsung/exynos5250/cpu.c b/src/cpu/samsung/exynos5250/cpu.c
index 8bf0d49..c49dec4 100644
--- a/src/cpu/samsung/exynos5250/cpu.c
+++ b/src/cpu/samsung/exynos5250/cpu.c
@@ -8,6 +8,7 @@
 #include <arch/cache.h>
 #include <cpu/samsung/exynos5250/fimd.h>
 #include <cpu/samsung/exynos5-common/s5p-dp-core.h>
+#include <cpu/samsung/exynos5-common/cpu.h>
 #include "chip.h"
 #include "cpu.h"
 
@@ -97,6 +98,8 @@
 {
 	exynos_displayport_init(dev);
 	ram_resource(dev, 0, RAM_BASE_KB, RAM_SIZE_KB);
+
+	arch_cpu_init();
 }
 
 static void cpu_noop(device_t dev)