clk: sifive: Sync-up main driver with upstream Linux

The DT bindings of SiFive clock driver in upstream Linux has
changes. As-per latest DT bindings, the clock driver takes two
parent clocks and compatible string has also changed.

This patch sync-up SiFive clock driver implementation as-per
upstream Linux so that we now use latest DT bindings.

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