net: lib: nrf_cloud: Remove unnecessary sub claim from JWT

Fixed regression from bd2d4a4, which caused a sub claim with
the device UUID to be included in the generated JWT with
nRF91x1. The sub claim is only needed when device UUID is not
used as the nRF Cloud Device ID.

Signed-off-by: Tommi Kangas <tommi.kangas@nordicsemi.no>

Author: tokangas

subsys/net/lib/nrf_cloud/common/src/nrf_cloud_jwt.c

@@ -209,7 +209,8 @@ int nrf_cloud_jwt_generate(uint32_t time_valid_s, char *const jwt_buf, size_t jw
 		exp_delta_s = NRF_CLOUD_JWT_VALID_TIME_S_DEF;
 	}
 
-	if (IS_ENABLED(CONFIG_NRF_CLOUD_CLIENT_ID_SRC_INTERNAL_UUID)) {
+	if (IS_ENABLED(CONFIG_NRF_CLOUD_CLIENT_ID_SRC_INTERNAL_UUID) ||
+	    IS_ENABLED(CONFIG_NRF_CLOUD_CLIENT_ID_SRC_MDM_DEVICE_UUID)) {
 		/* The UUID is present in the iss claim, so there is no need
 		 * to also include it in the sub claim.
 		 */