nv50/ir: fix indirect texturing for non-array textures on nvc0

If a layer parameter is provided, we want to flip it to position 0 (and
combine it with any indirect params). However if the target is not an
array, there is no layer, so we have to shift all of the arguments down
by one to make room for it.

This fixes situations where there were non-coordinate parameters, such
as bias, lod, depth compare, explicit derivatives. Instead of adding a
new parameter at the front for the indirect reference, we would swap one
of those in its place.

Fixes dEQP-GLES31.functional.shaders.opaque_type_indexing.sampler.uniform.compute.*shadow

Signed-off-by: Ilia Mirkin <[email protected]>
Reported-by: Samuel Pitoiset <[email protected]>
Tested-by: Samuel Pitoiset <[email protected]>
Cc: "11.1 11.2" <[email protected]>

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