nvmet: declare 2.1 version compliance

The target driver implements all the mandatory logs, identifications,
features, and properties up to nvme sepcification 2.1.

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Matias Bjørling <matias.bjorling@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

drivers/nvme/target/nvmet.h

@@ -22,7 +22,7 @@
 #include <linux/t10-pi.h>
 #include <linux/kfifo.h>
 
-#define NVMET_DEFAULT_VS		NVME_VS(1, 3, 0)
+#define NVMET_DEFAULT_VS		NVME_VS(2, 1, 0)
 
 #define NVMET_ASYNC_EVENTS		4
 #define NVMET_ERROR_LOG_SLOTS		128