v4l2object: Handle BT2020 for colorspace and transfer

This was not fully handled in switches and
ub gst_v4l2_object_get_colorspace();

https://bugzilla.gnome.org/show_bug.cgi?id=787313

sys/v4l2/gstv4l2object.c

@@ -2037,7 +2037,7 @@ gst_v4l2_object_get_colorspace (struct v4l2_format *fmt,
       cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
       break;
     case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
-      GST_FIXME ("BT2020 with constant lumma is not defined, assuming BT2020");
+      GST_FIXME ("BT2020 with constant luma is not defined, assuming BT2020");
       /* fallthrough */
     case V4L2_YCBCR_ENC_BT2020:
       cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
@@ -3191,6 +3191,9 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
         else
           colorspace = V4L2_COLORSPACE_SRGB;
         break;
+      case GST_VIDEO_COLOR_PRIMARIES_BT2020:
+        colorspace = V4L2_COLORSPACE_BT2020;
+        break;
       case GST_VIDEO_COLOR_PRIMARIES_BT470M:
         colorspace = V4L2_COLORSPACE_470_SYSTEM_M;
         break;
@@ -3269,6 +3272,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
       case GST_VIDEO_TRANSFER_GAMMA10:
         transfer = V4L2_XFER_FUNC_NONE;
         break;
+      case GST_VIDEO_TRANSFER_BT2020_12:
       case GST_VIDEO_TRANSFER_BT709:
         transfer = V4L2_XFER_FUNC_709;
         break;