uncrustify: force a single EOF newline

The CI compliance check scripts check for newlines in patch submissions.

Signed-off-by: Jake Swensen <jake@swensen.io>
diff --git a/.uncrustify.cfg b/.uncrustify.cfg
index 6026630..05b11ab 100644
--- a/.uncrustify.cfg
+++ b/.uncrustify.cfg
@@ -25,6 +25,13 @@
 nl_fdef_brace       = add       # "int foo() {" vs "int foo()\n{"
 
 #
+# End of file behavior
+#
+
+nl_end_of_file      = force     # string (add/force/ignore/remove)
+nl_end_of_file_min  = 1         # The min number of newlines at end of file
+
+#
 # Source code modifications
 #