checkpatch: Add +x check on Device Tree source files

dts and dtsi files should not be given +x permissions.

Change-Id: I23fa5d4012f935f64975471bd6c023b141cde45b
Signed-off-by: Michael Bohan <mbohan@codeaurora.org>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 4c655c2..d2f60a0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1629,6 +1629,8 @@
 			 $exec_file =~ /^.+\.ihex$/ or
 			 $exec_file =~ /^.+\.hex$/ or
 			 $exec_file =~ /^.+\.HEX$/ or
+			 $exec_file =~ /^.+\.dts$/ or
+			 $exec_file =~ /^.+\.dtsi$/ or
 			 $exec_file =~ /^.+defconfig$/ or
 			 $exec_file =~ /^Makefile$/ or
 			 $exec_file =~ /^Kconfig$/) &&