Remove trailing whitespace

Go through source files and remove all trailing whitespace

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
diff --git a/tc/em_u32.c b/tc/em_u32.c
index b8857f1..402bea0 100644
--- a/tc/em_u32.c
+++ b/tc/em_u32.c
@@ -96,7 +96,7 @@
 		offset = bstrtoul(a);
 	} else
 		offset = bstrtoul(a);
-		
+
 	if (offset == ULONG_MAX)
 		return PARSE_ERR(a, "u32: invalid offset");