drm: msm: sde: Add support for Qseed3Lite

Change adds software support for Qseed3Lite. Coefficient register
space is re-defined. Qseed3Lite uses filter coefficients for only 2
filters, namely Y-2D Separable and UV-2D Separable. No coefficient
programming for directional filtering. Blend Config field in Op Mode
register is depricated for Qseed3lite. No LUT coefficient programming
for destination scalar, as it is used for only upscaling, coefficients
are hard-coded inside HW to save area. Additional fields for Directional
Weight and Blend Filter Ratio are added in drm scaler structure.

Change-Id: Icf4cf7af00e94e545e92370d265e2dbb51e84188
Signed-off-by: Shubhashree Dhar <dhar@codeaurora.org>