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 <sam.shih@mediatek.com>
Link: https://lore.kernel.org/r/20220119123658.10095-2-sam.shih@mediatek.com


Reported-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>