USB: apple-mfi-fastcharge: fix endianess issue in probe

The product ID is little endian and needs to be converted.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Link: https://lore.kernel.org/r/20200213111336.32392-1-oneukum@suse.com


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