CONFIG_LEDS is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Timer and CPU usage LEDs

modulename: leds.ko

configname: CONFIG_LEDS

Linux Kernel Configuration
└─>Kernel Features
└─>Timer and CPU usage LEDs
In linux kernel since version 2.6.12  
If you say Y here, the LEDs on your machine will be used
to provide useful information about your current system status.

If you are compiling a kernel for a NetWinder or EBSA-285, you will
be able to select which LEDs are active using the options below. If
you are compiling a kernel for the EBSA-110 or the LART however, the
red LED will simply flash regularly to indicate that the system is
still functional. It is safe to say Y here if you have a CATS
system, but the driver will do nothing.