drm/amd/pm/powerplay/hwmgr/ppatomctrl: Fix documentation for 'mpll_param'

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

 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:290: warning: Function parameter or member 'mpll_param' not described in 'atomctrl_get_memory_pll_dividers_si'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:290: warning: Excess function parameter 'dividers' description in 'atomctrl_get_memory_pll_dividers_si'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:339: warning: Function parameter or member 'mpll_param' not described in 'atomctrl_get_memory_pll_dividers_vi'
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppatomctrl.c:339: warning: Excess function parameter 'dividers' description in 'atomctrl_get_memory_pll_dividers_vi'

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/ppatomctrl.c

@@ -279,7 +279,7 @@ static const ATOM_VOLTAGE_OBJECT_V3 *atomctrl_lookup_voltage_type_v3(
  *
  * @hwmgr:           input parameter: pointer to HwMgr
  * @clock_value:     input parameter: memory clock
- * @dividers:        output parameter: memory PLL dividers
+ * @mpll_param:      output parameter: memory clock parameters
  * @strobe_mode:     input parameter: 1 for strobe mode,  0 for performance mode
  */
 int atomctrl_get_memory_pll_dividers_si(
@@ -332,7 +332,7 @@ int atomctrl_get_memory_pll_dividers_si(
  *
  * @hwmgr:                 input parameter: pointer to HwMgr
  * @clock_value:           input parameter: memory clock
- * @dividers:              output parameter: memory PLL dividers
+ * @mpll_param:            output parameter: memory clock parameters
  */
 int atomctrl_get_memory_pll_dividers_vi(struct pp_hwmgr *hwmgr,
 		uint32_t clock_value, pp_atomctrl_memory_clock_param *mpll_param)