memblock tests: set memblock_debug to enable memblock_dbg() messages

If Memblock simulator was compiled with MEMBLOCK_DEBUG=1, set
memblock_debug to 1 so that memblock_dbg() will print debug information
when memblock functions are tested in Memblock simulator.
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/aee4200cce1c09992ed055006a81fde1b6b5b567.1656907314.git.remckee0@gmail.com

tools/testing/memblock/internal.h

@@ -2,6 +2,13 @@
 #ifndef _MM_INTERNAL_H
 #define _MM_INTERNAL_H
 
+/*
+ * Enable memblock_dbg() messages
+ */
+#ifdef MEMBLOCK_DEBUG
+static int memblock_debug = 1;
+#endif
+
 struct page {};
 
 void memblock_free_pages(struct page *page, unsigned long pfn,