dt-bindings: clock: gcc-msm8998: Add definitions of SSC-related clocks

Add definitions of four clocks which need to be manipulated in order to
initialize the AHB bus which exposes the SCC block in the global address
space.

Signed-off-by: Michael Srba <Michael.Srba@seznam.cz>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220411072156.24451-2-michael.srba@seznam.cz