Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32F107xx/USB_OTG_HOST/FS_HCFG#0x0
OTG_FS host configuration register (OTG_FS_HCFG)
FS/LS PHY clock select
FS- and LS-only support
https://github.com/cmsis-svd/cmsis-svd-data