thermal/drivers/uniphier: Use regular comment syntax

Use "/*" comment for the file's initial comment since it is not
in kernel-doc format. This prevents a kernel-doc warning:

drivers/thermal/uniphier_thermal.c:26: warning: expecting prototype for uniphier_thermal.c(). Prototype was for PVTCTLEN() instead
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Amit Kucheria <amitk@kernel.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: linux-pm@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230113064507.17224-1-rdunlap@infradead.orgSigned-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

drivers/thermal/uniphier_thermal.c

 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * uniphier_thermal.c - Socionext UniPhier thermal driver
  * Copyright 2014      Panasonic Corporation
  * Copyright 2016-2017 Socionext Inc.