drm/amd/amdgpu: add complete header search path

The path for the "mod_info_packet.h" header file is
incomplete, so add its location to the header search path
in the amdgpu Makefile.

See on ARCH=alpha (275 times in one build).

In file included from ../drivers/gpu/drm/amd/amdgpu/amdgpu.h:90,
                 from ../drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c:43:
../drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.h:62:10: fatal error: mod_info_packet.h: No such file or directory
   62 | #include "mod_info_packet.h"
      |          ^~~~~~~~~~~~~~~~~~~
compilation terminated.

Fixes: 5b49da02ddbe ("drm/amd/display: Enable Freesync over PCon")
Signed-off-by: Randy Dunlap <[email protected]>
Cc: Signed-off-by: Sung Joon Kim <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: Christian König <[email protected]>
Cc: "Pan, Xinhui" <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Alex Deucher <[email protected]>

0 files changed, 0 insertions, 0 deletions