Add validation during crtc_atomic_check to have crtc width as
multiple of 4 when dualpipe 3d-mux is enabled and multiple of 8
when quadpipe 3d-mux is enabled. This ensures each layer mixer
is having an even width.
Change-Id: I5dc173c1b0349430a8e12a7b1c9440c7854e7ecd
Signed-off-by: Veera Sundaram Sankaran <quic_veeras@quicinc.com>