configure: Fix linking d3d12va in UWP mode

Signed-off-by: Martin Storsjö <martin@martin.st>

configure

@@ -3922,7 +3922,7 @@ swscale_suggest="libm stdatomic"
 
 avcodec_extralibs="pthreads_extralibs iconv_extralibs dxva2_extralibs lcms2_extralibs"
 avfilter_extralibs="pthreads_extralibs"
-avutil_extralibs="d3d11va_extralibs mediacodec_extralibs nanosleep_extralibs pthreads_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vaapi_win32_extralibs vdpau_x11_extralibs"
+avutil_extralibs="d3d11va_extralibs d3d12va_extralibs mediacodec_extralibs nanosleep_extralibs pthreads_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vaapi_win32_extralibs vdpau_x11_extralibs"
 
 # programs
 ffmpeg_deps="avcodec avfilter avformat threads"
@@ -7123,6 +7123,7 @@ if enabled uwp; then
     # try to load these APIs at runtime, like we do in regular desktop mode -
     # therefore, we need to link directly against these APIs.
     d3d11va_extralibs="-ldxgi -ld3d11"
+    d3d12va_extralibs="-ldxgi -ld3d12"
     vaapi_win32_extralibs="-ldxgi"
     mediafoundation_extralibs="-lmfplat $mediafoundation_extralibs"
 fi