drm/amd/display: Correct kdoc formatting for DCN32_CRB_SEGMENT_SIZE_KB in dcn32_hubbub.c

Fixes the following W=1 kernel build warning:

drivers/gpu/drm/amd/amdgpu/../display/dc/dcn32/dcn32_hubbub.c:45: warning: Cannot understand  * @DCN32_CRB_SEGMENT_SIZE_KB: Maximum Configurable Return Buffer size for
 on line 45 - I thought it was a doc line

Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>