clk: sifive: Sync-up DT bindings header with upstream Linux

The location and license header of DT bindings header for SiFive
clock driver has changed in upstream Linux hence this patch.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
3 files changed