wifi/cc3000: Fix wrong dummy reading on SSP1

Signed-off-by: Petr Štetiar <ynezz@true.cz>
wifi/cc3000: Fix code formatting

Signed-off-by: Petr Štetiar <ynezz@true.cz>
Merge pull request #9 from ynezz/dev-fixes

Small fixes in cc3000 driver