This change moves the DSC implementation into a separate file.
This is required to add support for new compression algorithms.
This cleanup change also, moves struct sde_encoder_virt
declaration to the encoder header file.
Change-Id: Idc3b96e65fcce2a7ee6e17af604cec0cb574f6f7
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>
