Calculation was wrongly walking uncompacted instructions, even if we had
some compacted in the middle, generating invalid size. Since we are
here just drop the instruction count, since in practice the caller will
have to walk the instruction stream anyway.
Fixes: 6267585778 ("intel/brw: Also return the size of the assembled shader")
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33532>
dd1ca1588d