drm/amd/display: Remove outdated register for dcn3+

[Why & How]
Remove MPCC_OGAM_LUT_RAM_CONTROL register which is outdated.
Reviewed-by: Nevenko Stupar <Nevenko.Stupar@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Tse Kaitlyn <Kaitlyn.Tse@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_mpc.h

@@ -99,11 +99,6 @@
 	SRII(MPCC_OGAM_CONTROL, MPCC_OGAM, inst),\
 	SRII(MPCC_OGAM_LUT_CONTROL, MPCC_OGAM, inst)
 
-/*
-	SRII(MPCC_OGAM_LUT_RAM_CONTROL, MPCC_OGAM, inst),\
-	SRII(MPCC_OGAM_MODE, MPCC_OGAM, inst)
-*/
-
 #define MPC_OUT_MUX_REG_LIST_DCN3_0(inst) \
 	MPC_OUT_MUX_COMMON_REG_LIST_DCN1_0(inst),\
 	SRII(CSC_MODE, MPC_OUT, inst),\