Fix libusb handling on FreeBSD

[AMDmi3]

• The library is named libusb.so, not libusb-1.0.so
• Type of third argument to get_port_numbers differs (int vs uint8_t)

Note that this currently fails CI on FreeBSD because it cannot find symbols from libusb. I have no idea on how to fix that, however FreeBSD port of SDL3 is not affected as it's built with SDL_DEPS_SHARED which avoids this and many others issues caused by runtime dependency linking.

[madebr]

Linking is failing because it cannot find the libusb_get_string_descriptor and libusb_fill_interrupt_transfer symbols, used here:

SDL/src/hidapi/libusb/hid.c

Line 316 in 9fcca83

len = libusb_get_string_descriptor(dev,

Perhaps these should be added to the libusb context here?