common: Move and rename CONFIG_SYS_SUPPORT_64BIT_DATA

This is not really a CONFIG since it is not intended to be set by boards.
Move it into the compiler header with other similar defines, and rename
it.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/common.h

@@ -35,10 +35,6 @@
 #include <flash.h>
 #include <image.h>
 
-#ifdef __LP64__
-#define CONFIG_SYS_SUPPORT_64BIT_DATA
-#endif
-
 #include <log.h>
 
 #include <asm/u-boot.h> /* boot information for Linux kernel */

include/compiler.h

@@ -144,4 +144,8 @@ typedef unsigned long int uintptr_t;
 #define likely(x)	__builtin_expect(!!(x), 1)
 #define unlikely(x)	__builtin_expect(!!(x), 0)
 
+#ifdef __LP64__
+#define MEM_SUPPORT_64BIT_DATA
+#endif
+
 #endif