[PATCH v2] selftests: ir_decoder: Convert header comment to proper multi-line block

[Abdelrahman Fekry <abdelrahmanfekry375@gmail.com>]

v2- fixed multiple trailing whitespace errors and
the Signed-off-by mismatch

The test file for the IR decoder used single-line comments
at the top to document its purpose and licensing,
which is inconsistent with the style used throughout the
Linux kernel.

In this patch i converted the file header to
a proper multi-line comment block
(/*) that aligns with standard kernel practices.
This improves readability, consistency across selftests,
and ensures the license and documentation are
clearly visible in a familiar format.

No functional changes have been made.

Signed-off-by: Abdelrahman Fekry <abdelrahmanfekry375@gmail.com>
---
 tools/testing/selftests/ir/ir_loopback.c | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/tools/testing/selftests/ir/ir_loopback.c b/tools/testing/selftests/ir/ir_loopback.c
index f4a15cbdd5ea..c94faa975630 100644
--- a/tools/testing/selftests/ir/ir_loopback.c
+++ b/tools/testing/selftests/ir/ir_loopback.c
@@ -1,14 +1,17 @@
 // SPDX-License-Identifier: GPL-2.0
-// test ir decoder
-//
-// Copyright (C) 2018 Sean Young <sean@mess.org>
-
-// When sending LIRC_MODE_SCANCODE, the IR will be encoded. rc-loopback
-// will send this IR to the receiver side, where we try to read the decoded
-// IR. Decoding happens in a separate kernel thread, so we will need to
-// wait until that is scheduled, hence we use poll to check for read
-// readiness.
-
+/* Copyright (C) 2018 Sean Young <sean@mess.org>
+ *
+ * Selftest for IR decoder
+ *
+ *
+ * When sending LIRC_MODE_SCANCODE, the IR will be encoded.
+ * rc-loopback will send this IR to the receiver side,
+ * where we try to read the decoded IR.
+ * Decoding happens in a separate kernel thread,
+ * so we will need to wait until that is scheduled,
+ * hence we use poll to check for read
+ * readiness.
+ */
 #include <linux/lirc.h>
 #include <errno.h>
 #include <stdio.h>
-- 
2.25.1