drivers/usb/misc: refactor min with min_t

Ensure type safety by using min_t() instead of min().

Also add the explicit `unsigned int` as scripts/checkpatch.pl warns about:

	WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@gmail.com>
Link: https://lore.kernel.org/r/20241112155817.3512577-5-snovitoll@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>