ectool: Add newline to warning message

Cosmetic fix:

$ sudo ./ectool -p
Cannot get EC ports from /proc/ioports, fallback to default.EC RAM:

Change-Id: Icc2b5bbbbfe7685e4fe512af029ce00b33a26daa
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46666
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/util/ectool/ectool.c b/util/ectool/ectool.c
index 0b238c4..cb6f280 100644
--- a/util/ectool/ectool.c
+++ b/util/ectool/ectool.c
@@ -127,7 +127,7 @@
 
 	if (get_ports && get_ec_ports() != 0)
 		fprintf(stderr, "Cannot get EC ports from /proc/ioports, "
-				"fallback to default.");
+				"fallback to default.\n");
 
 	if (iopl(3)) {
 		printf("You need to be root.\n");