modpost: fix modpost warnings for xtensa

Suppress warnings for two informational sections (.xt.lit and .xt.prop)
used by the Xtensa architecture.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 68e9f5ed..00f7512 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -827,6 +827,8 @@
 	".note*",
 	".got*",
 	".toc*",
+	".xt.prop",				 /* xtensa */
+	".xt.lit",         /* xtensa */
 	NULL
 };