can_rcv_own_msgs: Rename option -D => -d

-D will be used in the library for enabling debug info.

Link: https://lore.kernel.org/ltp/20231214151954.840244-7-pvorel@suse.cz/
Reviewed-by: Li Wang <liwang@redhat.com>
Signed-off-by: Petr Vorel <pvorel@suse.cz>
diff --git a/testcases/network/can/filter-tests/can_rcv_own_msgs.c b/testcases/network/can/filter-tests/can_rcv_own_msgs.c
index 6bb2619..ba40666 100644
--- a/testcases/network/can/filter-tests/can_rcv_own_msgs.c
+++ b/testcases/network/can/filter-tests/can_rcv_own_msgs.c
@@ -134,7 +134,7 @@
 
 static struct tst_test test = {
 	.options = (struct tst_option[]) {
-		{"D:", &can_dev_name, "CAN device name"},
+		{"d:", &can_dev_name, "CAN device name"},
 		{}
 	},
 	.setup = setup,