staging: rtl8188eu: refactor led related structures.

struct led_priv contains two variables SwLed0 and SwLed1 but only
SwLed0 is being used by SwLedControlModel1() function.

SwLedControlModel1() function performs led operations.

This patch removes SwLed1 and code which uses SwLed1.

Signed-off-by: navin patidar <navin.patidar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>