disp: msm: correct dsc parameters for 8 bpc 8 bpp

Correct DSC 1.1 rate control parameter related to
8 bpc 8 bpp configuration according to VESA DSC
specification.

Change-Id: I4b17c61f79ea2b497cbf243a2b99c9b40a9b7ea8
Signed-off-by: Raghavendra Ambadas <quic_c_rambad@quicinc.com>