mesa/drivers: Fix clang constant-logical-operand warnings.

mesa/drivers: Fix clang constant-logical-operand warnings.

This patch fixes several clang constant-logical-operand warnings such as
the following.

../../../../../src/mesa/tnl_dd/t_dd_tritmp.h:130:32: warning: use of logical '||' with constant operand [-Wconstant-logical-operand]
   if (DO_TWOSIDE || DO_OFFSET || DO_UNFILLED || DO_TWOSTENCIL)
                               ^  ~~~~~~~~~~~
../../../../../src/mesa/tnl_dd/t_dd_tritmp.h:130:32: note: use '|' for a bitwise operation
   if (DO_TWOSIDE || DO_OFFSET || DO_UNFILLED || DO_TWOSTENCIL)
                               ^~
                               |

Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>