malloc: Show amount of used space when memory runs out

Show a bit more information when malloc() space is exhausted and
debugging is enabled.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/malloc_simple.c b/common/malloc_simple.c
index 5a8ec53..f0f90a0 100644
--- a/common/malloc_simple.c
+++ b/common/malloc_simple.c
@@ -26,7 +26,8 @@
 	log_debug("size=%lx, ptr=%lx, limit=%x: ", (ulong)bytes, new_ptr,
 		  gd->malloc_limit);
 	if (new_ptr > gd->malloc_limit) {
-		log_err("alloc space exhausted\n");
+		log_err("alloc space exhausted ptr %lx limit %x\n", new_ptr,
+			gd->malloc_limit);
 		return NULL;
 	}