i965: Skip update_texture_surface when the plane doesn't exist
i965: Skip update_texture_surface when the plane doesn't exist

Thanks to rebase fail, recent surface state changes (commits 7e951cd56,
8521ce1a7, and 69c0dc5c53) effectively reverted 727a9b24933 and 367cf3a2e3e
which was unintentional.  This should bring it back.

Signed-off-by: Jason Ekstrand <68c46a606457643eab92053c1c05574abb26f861@jlekstrand.net>
Reviewed-by: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler