intel: add devinfo->has_64bit_float_via_math_pipe

Unusual hardware features that require special hanlding usually get a
devinfo field, so do this for MTL's unordered DF types. This will
guarantee that any platform based on MTL (thus inheriting from
MTL_FEATURES) will automatically be handled in these special cases.

v2: s/has_unordered_64bit_float/has_64bit_float_via_math_pipe/ (Curro).

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20072>

src/intel/compiler/brw_ir_fs.h

@@ -549,7 +549,7 @@ static inline bool
 is_unordered(const intel_device_info *devinfo, const fs_inst *inst)
 {
    return is_send(inst) || inst->is_math() ||
-          (intel_device_info_is_mtl(devinfo) &&
+          (devinfo->has_64bit_float_via_math_pipe &&
            (get_exec_type(inst) == BRW_REGISTER_TYPE_DF ||
             inst->dst.type == BRW_REGISTER_TYPE_DF));
 }