MMFMWK-7996 vpudec: limited sink caps for 845s

mscale 845s vpu only support H264/H265/VP8/VP9 input

Signed-off-by: Haihua Hu <jared.hu@nxp.com>
diff --git a/plugins/vpu/gstvpudecobject.c b/plugins/vpu/gstvpudecobject.c
index a462b7b..1484e9d 100755
--- a/plugins/vpu/gstvpudecobject.c
+++ b/plugins/vpu/gstvpudecobject.c
@@ -142,6 +142,11 @@
           map++;
           continue;
         }
+        if (IS_IMX8MM() && (map->std != VPU_V_HEVC && map->std != VPU_V_VP9
+                    && map->std != VPU_V_AVC && map->std != VPU_V_VP8)) {
+            map++;
+            continue;
+        }
         if (caps) {
           GstCaps *newcaps = gst_caps_from_string (map->mime);
           if (newcaps) {