Revert "ANDROID: mm/cma: Return the present value of 'page' in the failure cases"

This reverts commit 4fc295812a.

It causes merge issues with tag 'drm-next-2025-04-05' and can be
reapplied later if really needed.

Change-Id: Ie32540328d0a06e1e036cf2a5c1ac16a1ac0aed0
Signed-off-by: Carlos Llamas <cmllamas@google.com>

mm/cma.c

@@ -431,7 +431,7 @@ struct page *__cma_alloc(struct cma *cma, unsigned long count,
 
 	if (WARN_ON_ONCE((gfp & GFP_KERNEL) == 0 ||
 		(gfp & ~(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY)) != 0))
-		return page;
+		goto out;
 
 	trace_cma_alloc_start(name, count, align);