intel/fs: Fix a typo in need_matching_subreg_offset

This fixes a bunch of Vulkan subgroup tests on little core platforms.

Fixes: 4150920b95 "intel/fs: Add a helper for emitting scan operations"
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Tested-by: Mark Janes <mark.a.janes@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/intel/compiler/brw_fs_builder.h

@@ -795,7 +795,7 @@ namespace brw {
              !gen_device_info_is_9lp(shader->devinfo))
             return false;
 
-         if (type_sz(type > 4))
+         if (type_sz(type) > 4)
             return true;
 
          if (opcode == BRW_OPCODE_MUL &&