dt-bindings: add platform specific ETZPC bindings

Define ETZPC bindings for STM32MP15 and STM32MP13 and add these
header files into the stm32mp_dt_bindings helper. While there, also
update some incl

dt-bindings: add platform specific ETZPC bindings

Define ETZPC bindings for STM32MP15 and STM32MP13 and add these
header files into the stm32mp_dt_bindings helper. While there, also
update some includes to fix the path errors.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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