staging: rtl8188eu: Remove _ReadLEDSetting() function.

_ReadLEDSetting() doesn't read led settings this function actually
initialize  member variables of struct led_priv, we should do that
inside rtl8188eu_InitSwLeds().

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