hw: move headers to include/

Many of these should be cleaned up with proper qdev-/QOM-ification.
Right now there are many catch-all headers in include/hw/ARCH depending
on cpu.h, and this makes it necessary to compile these files per-target.
However, fixing this does not belong in these patches.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/exynos4210_combiner.c b/hw/exynos4210_combiner.c
index 5818f10..6874287 100644
--- a/hw/exynos4210_combiner.c
+++ b/hw/exynos4210_combiner.c
@@ -29,7 +29,7 @@
 
 #include "hw/sysbus.h"
 
-#include "hw/exynos4210.h"
+#include "hw/arm/exynos4210.h"
 
 //#define DEBUG_COMBINER