drm/amd/powerplay: Change assignment for a buffer variable in phm_dispatch_table() v2

The variable "temp_storage" was eventually reassigned with a pointer.
Thus omit the explicit initialisation at the beginning.

v2: agd: fix coding style
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -60,7 +60,7 @@ int phm_dispatch_table(struct pp_hwmgr *hwmgr,
 		       void *input, void *output)
 {
 	int result = 0;
-	void *temp_storage = NULL;
+	void *temp_storage;
 
 	if (hwmgr == NULL || rt_table == NULL) {
 		printk(KERN_ERR "[ powerplay ] Invalid Parameter!\n");
@@ -73,6 +73,8 @@ int phm_dispatch_table(struct pp_hwmgr *hwmgr,
 			printk(KERN_ERR "[ powerplay ] Could not allocate table temporary storage\n");
 			return -ENOMEM;
 		}
+	} else {
+		temp_storage = NULL;
 	}
 
 	result = phm_run_table(hwmgr, rt_table, input, output, temp_storage);