boards: arm: stm32: add pinctrl state name for I2C peripheral

Add the pinctrl state name (default) for the I2C peripherals.
Changes performed based on the script proposed in
"boards: arm: stm32: add pinctrl state name for UART peripheral"

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
84 files changed