common: clean up setjmp.h

Separate setjmp.h into an architecture independent part and an architecture
specific part. This simplifies moving from using struct jmp_buf_data
directly to using type jmp_buf in our code which is the C compliant way.

Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/arch/arm/mach-rockchip/bootrom.c b/arch/arm/mach-rockchip/bootrom.c
index 82a0b3e..1db3854 100644
--- a/arch/arm/mach-rockchip/bootrom.c
+++ b/arch/arm/mach-rockchip/bootrom.c
@@ -4,11 +4,11 @@
  */
 
 #include <hang.h>
+#include <setjmp.h>
 #include <asm/arch-rockchip/bootrom.h>
 #include <asm/arch-rockchip/boot_mode.h>
 #include <asm/cache.h>
 #include <asm/io.h>
-#include <asm/setjmp.h>
 #include <asm/system.h>
 
 /*