Use separate endpoint numbers (EP1 OUT, EP2 IN) on MCUs with shared
FIFO that cannot support the same endpoint number in both directions.
Also add missing static qualifier to print_musb_info().
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
microcontrollers. Replace vendor-specific macros with unified `U_`-prefixed equivalents, ensuring consistency and reducing duplication across all platforms.