Replaced memsizes.c with smaller memmap.c, taking advantage of __data16,

and creating a memory map that's easier to work with than the E820 map.

src/arch/i386/include/memmap.h

@@ -0,0 +1,23 @@
+#ifndef _MEMMAP_H
+#define _MEMMAP_H
+
+#include <stdint.h>
+
+/**
+ * @file
+ *
+ * Memory mapping
+ *
+ */
+
+/** A usable memory region */
+struct memory_region {
+	/** Physical start address */
+	uint64_t start;
+	/** Physical end address */
+	uint64_t end;
+};
+
+extern void get_memmap ( struct memory_region *memmap, unsigned int entries );
+
+#endif /* _MEMMAP_H */