clk: visconti: Initial support Visconti SoC for v5.15

[Stephen Boyd]

Quoting Nobuhiro Iwamatsu (2021-08-26 00:03:36)
> The following changes since commit e73f0f0ee7541171d89f2e2491130c7771ba58d3:
> 
>   Linux 5.14-rc1 (2021-07-11 15:07:40 -0700)
> 
> are available in the Git repository at:
> 
>   https://git.kernel.org/pub/scm/linux/kernel/git/iwamatsu/linux-visconti.git
> tags/clk-visconti-5.15

I reviewed the patches on the list. Seems that nobody else did.