soc: arm: stm32g0: add hw flow control property for usart1 to dts fixup
soc: arm: stm32g0: add hw flow control property for usart1 to dts fixup

This commit adds the missing USART1 HW_FLOW_CONTROL property to the
stm32g0 DTS fixup file.

Signed-off-by: Filip Brozovic <9e406e4eada0a466898ca20f2c830a2e8d7bc324@gmail.com>

zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,Vudentz/zephyr,finikorg/zephyr,nashif/zephyr,finikorg/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,Vudentz/zephyr,finikorg/zephyr,nashif/zephyr,Vudentz/zephyr,Vudentz/zephyr,galak/zephyr,galak/zephyr,nashif/zephyr,Vudentz/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr