drm/amd/pm/powerplay/hwmgr/vega10_hwmgr: Fix worthy function headers, demote barely documented one

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_hwmgr.c:1556: warning: Function parameter or member 'acg_freq' not described in 'vega10_populate_single_gfx_level'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_hwmgr.c:1621: warning: Function parameter or member 'current_soc_did' not described in 'vega10_populate_single_soc_level'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_hwmgr.c:1621: warning: Function parameter or member 'current_vol_index' not described in 'vega10_populate_single_soc_level'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_hwmgr.c:1621: warning: Excess function parameter 'current_socclk_level' description in 'vega10_populate_single_soc_level'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_hwmgr.c:1757: warning: Function parameter or member 'current_mem_vid' not described in 'vega10_populate_single_memory_level'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_hwmgr.c:1757: warning: Function parameter or member 'current_memclk_level' not described in 'vega10_populate_single_memory_level'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_hwmgr.c:1757: warning: Function parameter or member 'current_mem_soc_vind' not described in 'vega10_populate_single_memory_level'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/vega10_hwmgr.c:2871: warning: Function parameter or member 'bitmap' not described in 'vega10_start_dpm'

Cc: Evan Quan <evan.quan@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c

@@ -1549,6 +1549,7 @@ static int vega10_populate_smc_link_levels(struct pp_hwmgr *hwmgr)
  * @hwmgr:      the address of the hardware manager
  * @gfx_clock:  the GFX clock to use to populate the structure.
  * @current_gfxclk_level:  location in PPTable for the SMC GFXCLK structure.
+ * @acg_freq:   ACG frequenty to return (MHz)
  */
 static int vega10_populate_single_gfx_level(struct pp_hwmgr *hwmgr,
 		uint32_t gfx_clock, PllSetting_t *current_gfxclk_level,
@@ -1612,7 +1613,8 @@ static int vega10_populate_single_gfx_level(struct pp_hwmgr *hwmgr,
  *
  * @hwmgr:     the address of the hardware manager.
  * @soc_clock: the SOC clock to use to populate the structure.
- * @current_socclk_level: location in PPTable for the SMC SOCCLK structure.
+ * @current_soc_did:   DFS divider to pass back to caller
+ * @current_vol_index: index of current VDD to pass back to caller
  * return:      0 on success
  */
 static int vega10_populate_single_soc_level(struct pp_hwmgr *hwmgr,
@@ -1744,7 +1746,7 @@ static void vega10_populate_vddc_soc_levels(struct pp_hwmgr *hwmgr)
 	}
 }
 
-/**
+/*
  * Populates single SMC GFXCLK structure using the provided clock.
  *
  * @hwmgr:     the address of the hardware manager.
@@ -2863,8 +2865,8 @@ static int vega10_stop_dpm(struct pp_hwmgr *hwmgr, uint32_t bitmap)
 /**
  * Tell SMC to enabled the supported DPMs.
  *
- * @hwmgr:  the address of the powerplay hardware manager.
- * @bitmap  bitmap for the features to enabled.
+ * @hwmgr:   the address of the powerplay hardware manager.
+ * @bitmap:  bitmap for the features to enabled.
  * return:  0 on at least one DPM is successfully enabled.
  */
 static int vega10_start_dpm(struct pp_hwmgr *hwmgr, uint32_t bitmap)