Updated memory allocator to improve support for unaligned or partially

aligned blocks.

Moved header to include/malloc.h, since we now also provide the
POSIX-like malloc()/free() pair.

Not yet tested.

src/include/gpxe/malloc.h

@@ -1,36 +0,0 @@
-#ifndef _GPXE_MALLOC_H
-#define _GPXE_MALLOC_H
-
-#include <stdint.h>
-
-/** @file
- *
- * Memory allocation
- *
- */
-
-extern void * gmalloc ( size_t size );
-extern void gfree ( void *ptr, size_t size );
-extern void gmpopulate ( void *start, size_t len );
-
-/**
- * Allocate cleared memory
- *
- * @v size		Requested size
- * @ret ptr		Allocated memory
- *
- * Allocate memory as per gmalloc(), and zero it.
- *
- * Note that gmalloc() and gcalloc() are identical, in the interests
- * of reducing code size.  Callers should not, however, rely on
- * gmalloc() clearing memory, since this behaviour may change in
- * future.
- */
-static inline void * gcalloc ( size_t size ) {
-	return gmalloc ( size );
-}
-
-/* Debug function; not compiled in by default */
-void gdumpfree ( void );
-
-#endif /* _GPXE_MALLOC_H */