bdev/nvme: set default bdev_retry_count to 3

Now that we have a much more robust retry framework,
set the default bdev_retry_count to 3.  Users can
still override this default with the bdev_nvme_set_options
RPC as before.  This ensures that by default, we will
retry I/O when possible.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I045bf4969d02be32b951e72a148ce6b6e251dec1
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11107
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Dong Yi <dongx.yi@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>

module/bdev/nvme/bdev_nvme.c

@@ -135,7 +135,7 @@ static struct spdk_bdev_nvme_opts g_opts = {
 	.nvme_ioq_poll_period_us = 0,
 	.io_queue_requests = 0,
 	.delay_cmd_submit = SPDK_BDEV_NVME_DEFAULT_DELAY_CMD_SUBMIT,
-	.bdev_retry_count = 0,
+	.bdev_retry_count = 3,
 };
 
 #define NVME_HOTPLUG_POLL_PERIOD_MAX			10000000ULL