modesetting: Reduce "glamor initialization failed" message to X_INFO

This might be an error or not, for example refusing to work on llvmpipe
is normal and expected. glamor_egl_init() will print X_ERROR messages if
appropriate, so we don't need to here.

Reviewed-by: Michel Dänzer <>
3 jobs for glamor-init-message-hush in 8 minutes and 36 seconds (queued for 3 seconds)