spl: Remove #ifdefs with BOOTSTAGE

This feature has some helpers in its header file so that its functions
resolve to nothing when the feature is disabled. Add a few more and use
these to simplify the code.

With this there are no more #ifdefs in board_init_r()

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/spl.c b/common/spl/spl.c
index d676a03..2239ee9 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -538,17 +538,11 @@
 		      ret);
 		return ret;
 	}
-#ifdef CONFIG_BOOTSTAGE_STASH
 	if (!u_boot_first_phase()) {
-		const void *stash = map_sysmem(CONFIG_BOOTSTAGE_STASH_ADDR,
-					       CONFIG_BOOTSTAGE_STASH_SIZE);
-
-		ret = bootstage_unstash(stash, CONFIG_BOOTSTAGE_STASH_SIZE);
+		ret = bootstage_unstash_default();
 		if (ret)
-			debug("%s: Failed to unstash bootstage: ret=%d\n",
-			      __func__, ret);
+			log_debug("Failed to unstash bootstage: ret=%d\n", ret);
 	}
-#endif /* CONFIG_BOOTSTAGE_STASH */
 	bootstage_mark_name(get_bootstage_id(true),
 			    spl_phase_name(spl_phase()));
 #if CONFIG_IS_ENABLED(LOG)
@@ -866,12 +860,9 @@
 		      gd_malloc_ptr(), gd_malloc_ptr() / 1024);
 
 	bootstage_mark_name(get_bootstage_id(false), "end phase");
-#ifdef CONFIG_BOOTSTAGE_STASH
-	ret = bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR,
-			      CONFIG_BOOTSTAGE_STASH_SIZE);
+	ret = bootstage_stash_default();
 	if (ret)
 		debug("Failed to stash bootstage: err=%d\n", ret);
-#endif
 
 	if (IS_ENABLED(CONFIG_SPL_VIDEO_REMOVE)) {
 		struct udevice *dev;