scripts/gen_nvme.sh: remove unnecessary wrapper function

create_json_config_with_subsystems contents does not
need to be in a function. Moving it to main simplifies
--with-subsystems condition.

Signed-off-by: Karol Latecki <karol.latecki@intel.com>
Change-Id: I1414a209cc666ebb4639fc25133168482bd96c97
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/8775
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>

scripts/gen_nvme.sh

@@ -49,16 +49,6 @@ function create_json_config() {
 	JSON
 }
 
-function create_json_config_with_subsystems() {
-	cat <<- JSON
-		{
-			"subsystems": [
-				$(create_json_config)
-			]
-		}
-	JSON
-}
-
 while getopts 'h-:' optchar; do
 	case "$optchar" in
 		-)
@@ -73,8 +63,17 @@ while getopts 'h-:' optchar; do
 	esac
 done
 
+bdev_json_cfg=$(create_json_config)
 if [[ $gen_subsystems == true ]]; then
-	create_json_config_with_subsystems
-else
-	create_json_config
+	bdev_json_cfg=$(
+		cat <<- JSON
+			{
+				"subsystems": [
+					$bdev_json_cfg
+				]
+			}
+		JSON
+	)
 fi
+
+echo "$bdev_json_cfg"