clk: sprd: add dt-bindings include for mipi_csi_xx clocks

mipi_csi_xx clocks are used by camera sensors.

Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lkml.kernel.org/r/20200527053638.31439-4-zhang.lyra@gmail.com


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