clk: mediatek: relicense mt7986 clock driver to GPL-2.0

The previous mt7986 clock drivers were incorrectly marked as GPL-1.0.
This patch changes the driver to the standard GPL-2.0 license.

Signed-off-by: Sam Shih <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reported-by: Lukas Bulwahn <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/mediatek/clk-mt7986-apmixed.c

···
-// SPDX-License-Identifier: GPL-1.0
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2021 MediaTek Inc.
  * Author: Sam Shih <[e-mail]>

drivers/clk/mediatek/clk-mt7986-infracfg.c

···
-// SPDX-License-Identifier: GPL-1.0
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2021 MediaTek Inc.
  * Author: Sam Shih <[e-mail]>

drivers/clk/mediatek/clk-mt7986-topckgen.c

···
-// SPDX-License-Identifier: GPL-1.0
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2021 MediaTek Inc.
  * Author: Sam Shih <[e-mail]>