drm/amdgpu/pm: clean up some inconsistent indenting

Eliminate the follow smatch warning:

drivers/gpu/drm/amd/amdgpu/../pm/powerplay/amd_powerplay.c:1554
pp_asic_reset_mode_2() warn: inconsistent indenting.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c

@@ -1551,7 +1551,7 @@ static int pp_set_ppfeature_status(void *handle, uint64_t ppfeature_masks)
 static int pp_asic_reset_mode_2(void *handle)
 {
 	struct pp_hwmgr *hwmgr = handle;
-		int ret = 0;
+	int ret = 0;
 
 	if (!hwmgr || !hwmgr->pm_en)
 		return -EINVAL;