NVMe: __nvme_submit_admin_cmd() can be static

drivers/block/nvme-core.c:865:5: sparse: symbol '__nvme_submit_admin_cmd' was not declared. Should it be static?

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index f7a8717..8393f91 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -862,7 +862,7 @@
 	return nvme_submit_cmd(nvmeq, cmd);
 }
 
-int __nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd,
+static int __nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd,
 						u32 *result, unsigned timeout)
 {
 	int res;