staging: rtl8188eu: refactor SwLedControlMode1()

Refactor switch cases in SwLedControlMode1() to reduce
indentation level. Also clears line over 80 characters
checkpatch warnings.

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>