lavc/hevcdec: add 4:2:2 8-bit/10-bit VAAPI decode support

Add decode support for 4:2:2 8-bt and 10-bit HEVC Range Extension clips.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>

libavcodec/hevcdec.c

@@ -425,6 +425,12 @@ static enum AVPixelFormat get_format(HEVCContext *s, const HEVCSPS *sps)
 #endif
 #if CONFIG_HEVC_NVDEC_HWACCEL
         *fmt++ = AV_PIX_FMT_CUDA;
+#endif
+        break;
+    case AV_PIX_FMT_YUV422P:
+    case AV_PIX_FMT_YUV422P10LE:
+#if CONFIG_HEVC_VAAPI_HWACCEL
+       *fmt++ = AV_PIX_FMT_VAAPI;
 #endif
         break;
     case AV_PIX_FMT_YUV420P12: