Select IWLWIFI_LEDS automatically when either IWL3945_LEDS or
IWL4965_LEDS is selected. This avoids potential misconfigurations
which lead to build failures for iwl-led.c.
Cc: Miles Lane <miles.lane@gmail.com> Cc: reinette.chatre@intel.com Signed-off-by: John w. Linville <linville@tuxdriver.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>