clk: rockchip: fix copy-paste error in rk3399 testclk

Fix RK3368_* to RK3399_* for rk3399 clk_test clock.

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
1 file changed