The IAR compilier does not resolve references to fields in the anonym…

[yoyopod]

…ous structs defined within the usbh_dev0_t and usbh_device_t structs as they are defined. The problem seems to relate to the placement of the 'volatile' keyword at the struct level. I fixed the problem by removing the 'volatile' from the struct level, and instead placing it on each of the field declarations within the structs.

Describe the PR
IAR compile-time errors on src/host/usbh.c are removed by reassigning 'volatile' keyword from the struct level in two anonymous structs within outer structs to the individual field names within the anonymous structs. The original placement results in the field names appearing undefined when they are referenced later in the file.

Additional context

[hathach]

thanks for the update, look good