dt-bindings: media: st,stmipid02: Convert the text bindings to YAML

Convert the text STMIPID02 DT bindings to YAML DT format to permit
validation of DTs using this I2C CSI-2 to CPI bridge.

Reviewed-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220929145416.16336-1-marex@denx.de


Signed-off-by: Rob Herring <robh@kernel.org>