intel/fs: fixup a64 messages

And run algebraic when either int64 for float64 are not supported so
those don't end up in the generated code.

Cc: mesa-stable
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17396>

src/intel/compiler/brw_fs.cpp

@@ -6011,7 +6011,7 @@ fs_visitor::optimize()
       OPT(split_virtual_grfs);
 
       /* Lower 64 bit MOVs generated by payload lowering. */
-      if (!devinfo->has_64bit_float && !devinfo->has_64bit_int)
+      if (!devinfo->has_64bit_float || !devinfo->has_64bit_int)
          OPT(opt_algebraic);
 
       OPT(register_coalesce);