shader: Always write code to toggle clip plane

This prevents shader recompilation when the guest only wants to
enable/disable clip plane in a compatibility profile. Can improve
performance if many shaders have to be recompiled because of this,
which happens in some games like Portal 2.

Signed-off-by: Italo Nicola <italonicola@collabora.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
3 files changed