drm/amd/powerplay: add interface to init fb allocations (v2)

This patch adds interface to init fb allocations for smu.
It's to allocate vram bos to store smc table contents.

v2: add detailed info to describe this function
Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/amdgpu_smu.c

@@ -132,6 +132,12 @@ static int smu_sw_fini(void *handle)
 	return 0;
 }
 
+static int smu_init_fb_allocations(struct smu_context *smu)
+{
+	/* TODO */
+	return 0;
+}
+
 static int smu_smc_table_hw_init(struct smu_context *smu)
 {
 	int ret;
@@ -153,6 +159,13 @@ static int smu_smc_table_hw_init(struct smu_context *smu)
 	if (ret)
 		return ret;
 
+	/*
+	 * allocate vram bos to store smc table contents.
+	 */
+	ret = smu_init_fb_allocations(smu);
+	if (ret)
+		return ret;
+
 	return 0;
 }