drm/amdgpu: increase max number of ip base instances to 8

For Arcturus, the number of IP base instances is 8.
Signed-off-by: Le Ma <le.ma@amd.com>
Acked-by: Snow Zhang < Snow.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -737,7 +737,7 @@ enum amd_hw_ip_block_type {
 	MAX_HWIP
 };
 
-#define HWIP_MAX_INSTANCE	7
+#define HWIP_MAX_INSTANCE	8
 
 struct amd_powerplay {
 	void *pp_handle;