Hello Aravinthkumar Jayaprakasam,
Unfortunately the Android BSP for KK 4.4.3 does not support EPD for the i.MX6SL EVK. It supports the LCD port by default. You would need to customize u-Boot for using the EPDC and making sure that the kernel does have the necessary modules enabled (chances are they are).
The last version of the Android BSP with EPD support for the i.MX6SLEVK is 4.0.4. so it would be worth reviewing if it suits your needs.
I hope this information helps.
I'm sorry but since this BSP is no longer supported it's not available for download anymore. However, you may open a Case a request it and they may be able to locate it and send it to you.