Revert "soc/it8xxx2: enable FPU support"
Revert "soc/it8xxx2: enable FPU support"

This reverts commit b1ad97bc264c98236ba25a0997e7296babc387c9 since it
causes the following build failure:

  cc1: error: requested ABI requires '-march' to subsume the 'F'
  extension

Signed-off-by: Stephanos Ioannidis <dc76e9f0c0006e8f919e0c515c66dbba3982f785@stephanos.io>

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