renderer_vulkan: Gate reduced shadow binding count to Android only. (#17)

src/video_core/renderer_vulkan/vk_descriptor_manager.cpp

@@ -61,9 +61,13 @@ constexpr static std::array RASTERIZER_SETS = {
                 vk::DescriptorType::eStorageImage,
                 vk::DescriptorType::eStorageImage,
             },
+#ifdef ANDROID
         .binding_count = 4, // TODO: Combine cube faces to a single storage image
                             // some android devices only expose up to four storage
                             // slots per pipeline
+#else
+        .binding_count = 7,
+#endif
     },
 };