drm/amdgpu/powerplay: update smu7_ppsmc.h

Add new messages for polaris.
Reviewed-by: NEvan Quan <evan.quan@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/inc/smu7_ppsmc.h

@@ -395,6 +395,9 @@ typedef uint16_t PPSMC_Result;
 
 #define PPSMC_MSG_SetVBITimeout               ((uint16_t) 0x306)
 
+#define PPSMC_MSG_EnableFFC                   ((uint16_t) 0x307)
+#define PPSMC_MSG_DisableFFC                  ((uint16_t) 0x308)
+
 #define PPSMC_MSG_EnableDpmDidt               ((uint16_t) 0x309)
 #define PPSMC_MSG_DisableDpmDidt              ((uint16_t) 0x30A)