nak: Fix cbuf textures

Somewhere between writing c1510ad72e22 ("nak: Optimize bindless to cbuf
textures on Volta+") and me rebasing it a year later, we switched to
using the NV-specific ldc_nv intrinsic for cbuf loads.  It's basically
the same as load_ubo but we're detecting the wrong intrinsic so the
optimization does nothing.

Fixes: c1510ad72e22 ("nak: Optimize bindless to cbuf textures on Volta+")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33398>
1 file changed