target: add missing sense_reason_t annotations

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index 460e931..f310aac 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -1112,7 +1112,7 @@
 	unsigned char *buf;
 	unsigned char tbuf[SE_MODE_PAGE_BUF];
 	int length;
-	int ret = 0;
+	sense_reason_t ret = 0;
 	int i;
 
 	if (!cmd->data_length) {