score: Wire up asm-generic/xor.h

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/arch/score/include/asm/Kbuild b/arch/score/include/asm/Kbuild
index cebaff8..e1c7bb9 100644
--- a/arch/score/include/asm/Kbuild
+++ b/arch/score/include/asm/Kbuild
@@ -3,3 +3,4 @@
 
 generic-y += clkdev.h
 generic-y += trace_clock.h
+generic-y += xor.h