[RESEND v4 1/3] clk: bcm: rpi: Add support HEVC clock

[Stephen Boyd]

Quoting Ivan T. Ivanov (2022-08-29 08:21:52)
> Export clock required for RPiVid video decoder hardware.
> 
> Cc: Dom Cobley <popcornmix at gmail.com>
> Acked-by: Maxime Ripard <maxime at cerno.tech>
> Signed-off-by: Ivan T. Ivanov <iivanov at suse.de>
> ---

Applied to clk-next