cmake: Add win-mf plugin to OBS build for WoA

This commit updates the CMakeLists.txt file in the plugins directory to
incorporate the win-mf plugin into the OBS build system. This change
ensures that Media Foundation-based encoding is available for Windows
on ARM (WoA) devices, utilizing Qualcomm hardware for efficient video
Encoding.

Author: thirumalai-qcom

plugins/CMakeLists.txt

@@ -87,4 +87,5 @@ add_obs_plugin(text-freetype2)
 add_obs_plugin(vlc-video WITH_MESSAGE)
 add_obs_plugin(win-capture PLATFORMS WINDOWS)
 add_obs_plugin(win-dshow PLATFORMS WINDOWS)
+add_obs_plugin(win-mf PLATFORMS WINDOWS ARCHITECTURES ARM64)
 add_obs_plugin(win-wasapi PLATFORMS WINDOWS)