nir: rename glsl_type_is_struct() -> glsl_type_is_struct_or_ifc()

nir: rename glsl_type_is_struct() -> glsl_type_is_struct_or_ifc()

Replace done using:
find ./src -type f -exec sed -i -- \
's/glsl_type_is_struct(/glsl_type_is_struct_or_ifc(/g' {} \;

Acked-by: Karol Herbst <kherbst@redhat.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>