ARM: dts: stm32: add pins for stm32g0 typec controller on stm32mp13

Add gpio pin configuration to be used with stm32g0 typec controller. Define
the PI2 to enable internal pull-up on stm32mp13, used as interrupt pin on
stm32mp135f-dk board.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>