[HEADERS] One line per header in Kbuild files to reduce conflicts

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/include/linux/tc_ematch/Kbuild b/include/linux/tc_ematch/Kbuild
index 381e930..4a58a1c 100644
--- a/include/linux/tc_ematch/Kbuild
+++ b/include/linux/tc_ematch/Kbuild
@@ -1 +1,4 @@
-headers-y := tc_em_cmp.h tc_em_meta.h tc_em_nbyte.h tc_em_text.h
+header-y += tc_em_cmp.h
+header-y += tc_em_meta.h
+header-y += tc_em_nbyte.h
+header-y += tc_em_text.h