drm/amd/powerplay: fix the confusing ppfeature mask calculations

Simplify the ppfeature mask calculations.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -4407,9 +4407,9 @@ static int vega10_set_ppfeature_status(struct pp_hwmgr *hwmgr, uint64_t new_ppfe
 		return ret;
 
 	features_to_disable =
-		(features_enabled ^ new_ppfeature_masks) & features_enabled;
+		features_enabled & ~new_ppfeature_masks;
 	features_to_enable =
-		(features_enabled ^ new_ppfeature_masks) ^ features_to_disable;
+		~features_enabled & new_ppfeature_masks;
 
 	pr_debug("features_to_disable 0x%llx\n", features_to_disable);
 	pr_debug("features_to_enable 0x%llx\n", features_to_enable);

drivers/gpu/drm/amd/powerplay/hwmgr/vega12_hwmgr.c

@@ -2009,9 +2009,9 @@ static int vega12_set_ppfeature_status(struct pp_hwmgr *hwmgr, uint64_t new_ppfe
 		return ret;
 
 	features_to_disable =
-		(features_enabled ^ new_ppfeature_masks) & features_enabled;
+		features_enabled & ~new_ppfeature_masks;
 	features_to_enable =
-		(features_enabled ^ new_ppfeature_masks) ^ features_to_disable;
+		~features_enabled & new_ppfeature_masks;
 
 	pr_debug("features_to_disable 0x%llx\n", features_to_disable);
 	pr_debug("features_to_enable 0x%llx\n", features_to_enable);

drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c

@@ -3084,9 +3084,9 @@ static int vega20_set_ppfeature_status(struct pp_hwmgr *hwmgr, uint64_t new_ppfe
 		return ret;
 
 	features_to_disable =
-		(features_enabled ^ new_ppfeature_masks) & features_enabled;
+		features_enabled & ~new_ppfeature_masks;
 	features_to_enable =
-		(features_enabled ^ new_ppfeature_masks) ^ features_to_disable;
+		~features_enabled & new_ppfeature_masks;
 
 	pr_debug("features_to_disable 0x%llx\n", features_to_disable);
 	pr_debug("features_to_enable 0x%llx\n", features_to_enable);