soc: qcom: secure_buffer: Fix an uninitialized variable

Ensure variables are set before the are used to prevent random behavior.

Change-Id: Ib31e5aca648c0f442afe4cbe576ad79786fe6427
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
diff --git a/drivers/soc/qcom/secure_buffer.c b/drivers/soc/qcom/secure_buffer.c
index ba65e68..b2627f2 100644
--- a/drivers/soc/qcom/secure_buffer.c
+++ b/drivers/soc/qcom/secure_buffer.c
@@ -261,7 +261,7 @@
 			int *dest_vmids, int *dest_perms,
 			int dest_nelems)
 {
-	int ret;
+	int ret = 0;
 	struct scm_desc desc = {0};
 	u32 *source_vm_copy;
 	size_t source_vm_copy_size;