Documentation/gpu: Add kernel doc entry for MPC

This commit adds a kernel-doc entry for the MPC block. Since it enabled
the kernel-doc to parse some of the documentation in the mpc.h file,
fixing some of the comments was required.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Harry Wentland <Harry.Wentland@amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Documentation/gpu/amdgpu/display/dcn-blocks.rst

@@ -40,3 +40,15 @@ DPP
 
 .. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h
    :internal:
+
+MPC
+---
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
+   :doc: overview
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
+   :export:
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
+   :internal:

Documentation/gpu/amdgpu/display/display-manager.rst

@@ -131,9 +131,6 @@ The DRM blend mode and its elements are then mapped by AMDGPU display manager
 (DM) to program the blending configuration of the Multiple Pipe/Plane Combined
 (MPC), as follows:
 
-.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
-   :doc: mpc-overview
-
 .. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
    :functions: mpcc_blnd_cfg