drm/amdgpu: cleanup coding style in amdgpu_sync.c file

This is a patch to the amdgpu_sync.c file that fixes some warnings found by the checkpatch.pl tool
Signed-off-by: Jingyu Wang <jingyuwang_vip@163.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c

+// SPDX-License-Identifier: MIT
 /*
  * Copyright 2014 Advanced Micro Devices, Inc.
  * All Rights Reserved.
@@ -315,6 +316,7 @@ struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync)
 	struct hlist_node *tmp;
 	struct dma_fence *f;
 	int i;
+
 	hash_for_each_safe(sync->fences, i, tmp, e, node) {
 
 		f = e->fence;
@@ -392,7 +394,7 @@ void amdgpu_sync_free(struct amdgpu_sync *sync)
 {
 	struct amdgpu_sync_entry *e;
 	struct hlist_node *tmp;
-	unsigned i;
+	unsigned int i;
 
 	hash_for_each_safe(sync->fences, i, tmp, e, node) {
 		hash_del(&e->node);