video_code: Fix implicit switch fallthrough.

Since yesterday, this breaks the build on linux.
So let's fix it.

src/video_core/renderer_opengl/maxwell_to_gl.h

@@ -191,6 +191,7 @@ inline GLenum TextureFilterMode(Tegra::Texture::TextureFilter filter_mode,
         case Tegra::Texture::TextureMipmapFilter::Linear:
             return GL_LINEAR_MIPMAP_LINEAR;
         }
+        break;
     }
     case Tegra::Texture::TextureFilter::Nearest: {
         switch (mip_filter_mode) {
@@ -201,6 +202,7 @@ inline GLenum TextureFilterMode(Tegra::Texture::TextureFilter filter_mode,
         case Tegra::Texture::TextureMipmapFilter::Linear:
             return GL_NEAREST_MIPMAP_LINEAR;
         }
+        break;
     }
     }
     LOG_ERROR(Render_OpenGL, "Unimplemented texture filter mode={}", static_cast<u32>(filter_mode));