if matrixbit is 11,
The range of color matrix is from 0 to (BIT(11) - 1).
Values from 0 to (BIT(11) - 1) represent positive numbers,
values from BIT(11) to (BIT(12) - 1) represent negative numbers.
For example, -1 need converted to 8191.
Fixes: 738ed4156fba ("drm/mediatek: Add matrix_bits private data for ccorr")
Signed-off-by: Jay Liu <jay.liu@xxxxxxxxxxxx>