clk: qcom: add video clock controller driver for SM8250

Add support for the video clock controller found on SM8250 based devices.

Derived from the downstream driver.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Link: https://lore.kernel.org/r/20200923160635.28370-6-jonathan@marek.ca


Signed-off-by: Stephen Boyd <sboyd@kernel.org>