disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/tools/perf/arch/sparc/util/Build
..
..
@@ -1 +1 @@
1
-libperf-$(CONFIG_DWARF) += dwarf-regs.o
1
+perf-$(CONFIG_DWARF) += dwarf-regs.o