USB: ftdi_sio: clean up ftdi_set_max_packet_size()
USB: ftdi_sio: clean up ftdi_set_max_packet_size()

Code and comment style clean ups of ftdi_set_max_packet_size().

Signed-off-by: Johan Hovold <759412786bc533369b22377bf83fb9056c5b25b2@kernel.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs