isl_pw_aff_order_map: perform parameter alignment
isl_pw_aff_order_map: perform parameter alignment

Using isl_*_align_params_*_and to perform parameter alignment
was tricky because isl_pw_aff_order_map has an extra argument,
but since this was replaced in isl-0.22-54-g20d3574057
(perform parameter alignment by modifying both arguments
to function, Fri Dec 6 16:08:56 2019 +0100),
isl_pw_aff_order_map can easily perform the parameter alignment
itself instead of requiring all callers to do that.

Signed-off-by: Sven Verdoolaege <dd860110a62b19214c4ee03aec0abffecb4e86b8@cerebras.net>

Meinersbur/isl,Meinersbur/isl,Meinersbur/isl,Meinersbur/isl