drm/amd/amdgpu: Remove duplicate header

Remove gca/gfx_8_0_sh_mask.h which is included more than once
Signed-off-by: Brajeswar Ghosh <brajeswar.linux@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/mxgpu_vi.c

@@ -37,7 +37,6 @@
 #include "gmc/gmc_8_2_sh_mask.h"
 #include "oss/oss_3_0_d.h"
 #include "oss/oss_3_0_sh_mask.h"
-#include "gca/gfx_8_0_sh_mask.h"
 #include "dce/dce_10_0_d.h"
 #include "dce/dce_10_0_sh_mask.h"
 #include "smu/smu_7_1_3_d.h"