drivers/sensor/st: ism330dhcx: fix gyro range setting

Fix ism330dhcx_gyro_fs_map[] and ism330dhcx_gyro_fs_sens[] arrays
initialization in order to be able to correctly convert from dps
to register raw value through the array index.

Fix: #72617

Signed-off-by: Armando Visconti <armando.visconti@st.com>