linux_driver: fix typo in function call
hdl: adjust the number of cycles spent copying data in HS case

The number of bytes copied should also change depending on the USB speed of the
bladeRF. This commit completes commit 8d9ed972ca067a8cd276569d8e36f7d3b46c6daa.
Merge branch 'bladerf' of github.com:Nuand/bladeRF into dev-cli_add_rx_tx