smem: Don't use -EPROBE_DEFER

This has no useful meaning in U-Boot. Use -ENOMEM since that appears to
be what has gone wrong in this case. We want to reserve this flag for
internal driver model use.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/smem/msm_smem.c b/drivers/smem/msm_smem.c
index 597d425..2646215 100644
--- a/drivers/smem/msm_smem.c
+++ b/drivers/smem/msm_smem.c
@@ -437,7 +437,7 @@
 	int ret;
 
 	if (!__smem)
-		return -EPROBE_DEFER;
+		return -ENOMEM;
 
 	if (item < SMEM_ITEM_LAST_FIXED) {
 		dev_err(__smem->dev,
@@ -559,7 +559,7 @@
 {
 	struct smem_partition_header *phdr;
 	size_t cacheln;
-	void *ptr = ERR_PTR(-EPROBE_DEFER);
+	void *ptr = ERR_PTR(-ENOMEM);
 
 	if (!__smem)
 		return ptr;
@@ -597,7 +597,7 @@
 	unsigned int ret;
 
 	if (!__smem)
-		return -EPROBE_DEFER;
+		return -ENOMEM;
 
 	if (host < SMEM_HOST_COUNT && __smem->partitions[host]) {
 		phdr = __smem->partitions[host];