tools/bootconfig: Define memblock_free_ptr() to fix build error

The lib/bootconfig.c file is shared with the 'bootconfig' tooling, and
as a result, the changes incommit 77e02cf57b ("memblock: introduce
saner 'memblock_free_ptr()' interface") need to also be reflected in the
tooling header file.

So define the new memblock_free_ptr() wrapper, and remove unused __pa()
and memblock_free().

Fixes: 77e02cf57b ("memblock: introduce saner 'memblock_free_ptr()' interface")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

tools/bootconfig/include/linux/memblock.h

@@ -4,9 +4,8 @@
 
 #include <stdlib.h>
 
-#define __pa(addr)	(addr)
 #define SMP_CACHE_BYTES	0
 #define memblock_alloc(size, align)	malloc(size)
-#define memblock_free(paddr, size)	free(paddr)
+#define memblock_free_ptr(paddr, size)	free(paddr)
 
 #endif