drm/amdgpu/gfx10: new approach to load pfp fw (v4)

gfx10 allows to only upload pfp jumptable while save the whole
pfp image at gtt memory.

v2: program CP_PFP_IC_BASE_CNTL to default value
v3: switch to use amdgpu_bo_create_reserved to create pfp fw bo
v4: split common code from gfx10 code
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -195,10 +195,17 @@ struct sq_work {
 	unsigned ih_data;
 };
 
+struct amdgpu_pfp {
+	struct amdgpu_bo		*pfp_fw_obj;
+	uint64_t			pfp_fw_gpu_addr;
+	uint32_t			*pfp_fw_ptr;
+};
+
 struct amdgpu_gfx {
 	struct mutex			gpu_clock_mutex;
 	struct amdgpu_gfx_config	config;
 	struct amdgpu_rlc		rlc;
+	struct amdgpu_pfp		pfp;
 	struct amdgpu_mec		mec;
 	struct amdgpu_kiq		kiq;
 	struct amdgpu_scratch		scratch;