drm/amd/display: fix number of dcn21 dpm clock levels

These are specific to dcn21 and should not be increased for
reuse on other asics.
Signed-off-by: NDmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: NChris Park <Chris.Park@amd.com>
Acked-by: NLeo Li <sunpeng.li@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dm_pp_smu.h

@@ -251,8 +251,8 @@ struct pp_smu_funcs_nv {
 
 #define PP_SMU_NUM_SOCCLK_DPM_LEVELS  8
 #define PP_SMU_NUM_DCFCLK_DPM_LEVELS  8
-#define PP_SMU_NUM_FCLK_DPM_LEVELS    8
-#define PP_SMU_NUM_MEMCLK_DPM_LEVELS  8
+#define PP_SMU_NUM_FCLK_DPM_LEVELS    4
+#define PP_SMU_NUM_MEMCLK_DPM_LEVELS  4
 
 struct dpm_clock {
   uint32_t  Freq;    // In MHz