ACPI: TAD: Update the driver description comment

Update the preamble comment describing the driver to match the code
after previous changes along with the copyright information.

No functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/23034847.EfDdHjke4D@rafael.j.wysocki

Author: rafaeljw

drivers/acpi/acpi_tad.c

@@ -2,12 +2,10 @@
 /*
  * ACPI Time and Alarm (TAD) Device Driver
  *
- * Copyright (C) 2018 Intel Corporation
+ * Copyright (C) 2018 - 2026 Intel Corporation
  * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  *
- * This driver is based on Section 9.18 of the ACPI 6.2 specification revision.
- *
- * It only supports the system wakeup capabilities of the TAD.
+ * This driver is based on ACPI 6.6, Section 9.17.
  *
  * Provided are sysfs attributes, available under the TAD platform device,
  * allowing user space to manage the AC and DC wakeup timers of the TAD:
@@ -18,6 +16,11 @@
  *
  * The wakeup events handling and power management of the TAD is expected to
  * be taken care of by the ACPI PM domain attached to its platform device.
+ *
+ * If the TAD supports the get/set real time features, as indicated by the
+ * capability mask returned by _GCP under the TAD object, additional sysfs
+ * attributes are created allowing the real time to be set and read and an RTC
+ * class device is registered under the TAD platform device.
  */
 
 #include <linux/acpi.h>
@@ -32,7 +35,7 @@ MODULE_DESCRIPTION("ACPI Time and Alarm (TAD) Device Driver");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Rafael J. Wysocki");
 
-/* ACPI TAD capability flags (ACPI 6.2, Section 9.18.2) */
+/* ACPI TAD capability flags (ACPI 6.6, Section 9.17.2) */
 #define ACPI_TAD_AC_WAKE	BIT(0)
 #define ACPI_TAD_DC_WAKE	BIT(1)
 #define ACPI_TAD_RT		BIT(2)