selftests/net: update initializer syntax to use c99 designators

Before, clang version 9 threw errors such as: error:
use of GNU old-style field designator extension [-Werror,-Wgnu-designator]
                { tstamp: true, swtstamp: true }
                  ^~~~~~~
                  .tstamp =
Fix these warnings in tools/testing/selftests/net in the same manner as
commit 121e357a ("selftests/harness: Update named initializer syntax").
N.B. rxtimestamp.c is the only affected file in the directory.
Signed-off-by: Tanner Love <tannerlove@google.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/net/rxtimestamp.c

@@ -68,44 +68,44 @@ static struct socket_type socket_types[] = {
 static struct test_case test_cases[] = {
 	{ {}, {} },
 	{
-		{ so_timestamp: 1 },
-		{ tstamp: true }
+		{ .so_timestamp = 1 },
+		{ .tstamp = true }
 	},
 	{
-		{ so_timestampns: 1 },
-		{ tstampns: true }
+		{ .so_timestampns = 1 },
+		{ .tstampns = true }
 	},
 	{
-		{ so_timestamp: 1, so_timestampns: 1 },
-		{ tstampns: true }
+		{ .so_timestamp = 1, .so_timestampns = 1 },
+		{ .tstampns = true }
 	},
 	{
-		{ so_timestamping: SOF_TIMESTAMPING_RX_SOFTWARE },
+		{ .so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE },
 		{}
 	},
 	{
 		/* Loopback device does not support hw timestamps. */
-		{ so_timestamping: SOF_TIMESTAMPING_RX_HARDWARE },
+		{ .so_timestamping = SOF_TIMESTAMPING_RX_HARDWARE },
 		{}
 	},
 	{
-		{ so_timestamping: SOF_TIMESTAMPING_SOFTWARE },
-		warn_on_fail : true
+		{ .so_timestamping = SOF_TIMESTAMPING_SOFTWARE },
+		.warn_on_fail = true
 	},
 	{
-		{ so_timestamping: SOF_TIMESTAMPING_RX_SOFTWARE
+		{ .so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE
 			| SOF_TIMESTAMPING_RX_HARDWARE },
 		{}
 	},
 	{
-		{ so_timestamping: SOF_TIMESTAMPING_SOFTWARE
+		{ .so_timestamping = SOF_TIMESTAMPING_SOFTWARE
 			| SOF_TIMESTAMPING_RX_SOFTWARE },
-		{ swtstamp: true }
+		{ .swtstamp = true }
 	},
 	{
-		{ so_timestamp: 1, so_timestamping: SOF_TIMESTAMPING_SOFTWARE
+		{ .so_timestamp = 1, .so_timestamping = SOF_TIMESTAMPING_SOFTWARE
 			| SOF_TIMESTAMPING_RX_SOFTWARE },
-		{ tstamp: true, swtstamp: true }
+		{ .tstamp = true, .swtstamp = true }
 	},
 };