gallium/util: add bitcast helpers for double and uint
This complements u_bitcast_f2u and u_bitcast_u2f with similar helpers to cast between double and unsigned integers as well.
This is meant to help !7654 (merged) do things right.
This complements u_bitcast_f2u and u_bitcast_u2f with similar helpers to cast between double and unsigned integers as well.
This is meant to help !7654 (merged) do things right.