staging: wilc1000: correct inconsistent indenting

Correct inconsistent indenting reported by smatch.
Instead of simply remove indentation, refactor the
loop to also improve readabilitiy.

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>