drm/amd/display: Remove else after return in 'dm_vblank_get_counter' &...

drm/amd/display: Remove else after return in 'dm_vblank_get_counter' & 'amdgpu_dm_backlight_get_level'

Expressions under 'else' branch in function 'dm_vblank_get_counter' &
'amdgpu_dm_backlight_get_level' are executed whenever the expression in
'if' is False. Otherwise, return from function occurs. Therefore, there is
no need in 'else', and it has been removed.

Fixes the following:

WARNING: else is not generally useful after a break or return
+               return 0;
+       else {

WARNING: else is not generally useful after a break or return
+               return convert_brightness_to_user(&caps, avg);
+       } else {

Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: NSrinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: NRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -245,19 +245,20 @@ is_timing_unchanged_for_freesync(struct drm_crtc_state *old_crtc_state,
  */
 static u32 dm_vblank_get_counter(struct amdgpu_device *adev, int crtc)
 {
+	struct amdgpu_crtc *acrtc = NULL;
+
 	if (crtc >= adev->mode_info.num_crtc)
 		return 0;
-	else {
-		struct amdgpu_crtc *acrtc = adev->mode_info.crtcs[crtc];
 
-		if (acrtc->dm_irq_params.stream == NULL) {
-			DRM_ERROR("dc_stream_state is NULL for crtc '%d'!\n",
-				  crtc);
-			return 0;
-		}
+	acrtc = adev->mode_info.crtcs[crtc];
 
-		return dc_stream_get_vblank_counter(acrtc->dm_irq_params.stream);
+	if (!acrtc->dm_irq_params.stream) {
+		DRM_ERROR("dc_stream_state is NULL for crtc '%d'!\n",
+			  crtc);
+		return 0;
 	}
+
+	return dc_stream_get_vblank_counter(acrtc->dm_irq_params.stream);
 }
 
 static int dm_crtc_get_scanoutpos(struct amdgpu_device *adev, int crtc,
@@ -4091,6 +4092,7 @@ static int amdgpu_dm_backlight_update_status(struct backlight_device *bd)
 static u32 amdgpu_dm_backlight_get_level(struct amdgpu_display_manager *dm,
 					 int bl_idx)
 {
+	int ret;
 	struct amdgpu_dm_backlight_caps caps;
 	struct dc_link *link = (struct dc_link *)dm->backlight_link[bl_idx];
 
@@ -4105,13 +4107,14 @@ static u32 amdgpu_dm_backlight_get_level(struct amdgpu_display_manager *dm,
 		if (!rc)
 			return dm->brightness[bl_idx];
 		return convert_brightness_to_user(&caps, avg);
-	} else {
-		int ret = dc_link_get_backlight_level(link);
-
-		if (ret == DC_ERROR_UNEXPECTED)
-			return dm->brightness[bl_idx];
-		return convert_brightness_to_user(&caps, ret);
 	}
+
+	ret = dc_link_get_backlight_level(link);
+
+	if (ret == DC_ERROR_UNEXPECTED)
+		return dm->brightness[bl_idx];
+
+	return convert_brightness_to_user(&caps, ret);
 }
 
 static int amdgpu_dm_backlight_get_brightness(struct backlight_device *bd)