staging: ozwpan: Increase ISOC IN buffer depth

Buffer depth of 50 units is not sufficient when there is considerable delay
occuring on air due to interference, increase ISOC IN buffer depth to 100 units.

Signed-off-by: Rupesh Gujare <rupesh.gujare@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>