ci : Enable firmware for qcs615

Enable using firmware file for qcs615 target

Signed-off-by: Salendarsingh Gaud <sgaud@qti.qualcomm.com>

Author: sgaud-quic

ci/MACHINES.json

@@ -55,7 +55,7 @@
   },
   "qcs615-adp-air": {
     "machine": "qcs615-ride",
-    "firmware": "",
+    "firmware": "qcs615-ride",
     "lavaname": "qcs615-ride",
     "target": "qcs615-adp-air",
     "buildid": "",