staging: wilc1000: remove TODO item for comments and code style

Remove below item from TODO as these changes were included as part of
previous submitted patch series.

'rework comments and function headers(also coding style)'

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>