msm: ADSPRPC: Fix return value when dsp capabilities 
is not supported

Use new variable to find is dsp capability support
was successful.
Fix regression issue of 3657372.

Change-Id: Idb427f53ed8f23a0c2a60852457f7721f1ebca87
Signed-off-by: vgattupa <vgattupa@codeaurora.org>
diff --git a/drivers/char/adsprpc.c b/drivers/char/adsprpc.c
index 40abe94..a270394 100644
--- a/drivers/char/adsprpc.c
+++ b/drivers/char/adsprpc.c
@@ -3951,7 +3951,7 @@
 	} i;
 	void *param = (char *)ioctl_param;
 	struct fastrpc_file *fl = (struct fastrpc_file *)file->private_data;
-	int size = 0, err = 0;
+	int size = 0, err = 0, req_complete = 0;
 	uint32_t info;
 	static bool isQueryDone;
 
@@ -4155,8 +4155,8 @@
 		if (err)
 			goto bail;
 		if ((fl->cid == CDSP_DOMAIN_ID) && !isQueryDone) {
-			err = fastrpc_update_cdsp_support(fl);
-			if (!err)
+			req_complete = fastrpc_update_cdsp_support(fl);
+			if (!req_complete)
 				isQueryDone = true;
 		}
 		break;