drm/amd/powerplay: Remove useless variable

The result variable is initialized at the beginning of the function, but
its value does not change during the function execution. Thus, remove the
variable and return the SUCCESS value, which is 0.

Issue found by coccinelle script:
* Unneeded variable: "result". Return "0"

Path to the cocci script: scripts/coccinelle/misc/returnvar.cocci
Signed-off-by: Georgiana Chelu <georgiana.chelu93@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/vega10_processpptables.c

@@ -1174,7 +1174,6 @@ int vega10_pp_tables_initialize(struct pp_hwmgr *hwmgr)
 
 static int vega10_pp_tables_uninitialize(struct pp_hwmgr *hwmgr)
 {
-	int result = 0;
 	struct phm_ppt_v2_information *pp_table_info =
 			(struct phm_ppt_v2_information *)(hwmgr->pptable);
 
@@ -1217,7 +1216,7 @@ static int vega10_pp_tables_uninitialize(struct pp_hwmgr *hwmgr)
 	kfree(hwmgr->pptable);
 	hwmgr->pptable = NULL;
 
-	return result;
+	return 0;
 }
 
 const struct pp_table_func vega10_pptable_funcs = {