module/blob/bdev: use __SPDK_BDEV_MODULE_ONLY

This module only requires the spdk_bdev_module
APIs, so use this #define to avoid having to
bump so version when spdk_bdev is modified.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I292c38e60cbf21d0d5a6583cb2a2b097c524f3d1
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7811
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Michal Berger <michalx.berger@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>

module/blob/bdev/blob_bdev.c

@@ -38,6 +38,7 @@
 #include "spdk/thread.h"
 #include "spdk/log.h"
 #include "spdk/endian.h"
+#define __SPDK_BDEV_MODULE_ONLY
 #include "spdk/bdev_module.h"
 
 struct blob_bdev {