[PATCH] drm/amd/powerplay: fix a signedness bugs

[dan.carpenter@xxxxxxxxxx (Dan Carpenter)]

Smatch complains about a signedness bug here:

	vega10_hwmgr.c:4202 vega10_force_clock_level()
	warn: always true condition '(i >= 0) => (0-u32max >= 0)'

Fixes: 7b52db39a4c2 ("drm/amd/powerplay: fix bug sclk/mclk level can't be set on vega10.")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
index ad30f5d3a10d..2614af2f553f 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
@@ -4186,7 +4186,7 @@ static int vega10_force_clock_level(struct pp_hwmgr *hwmgr,
 		enum pp_clock_type type, uint32_t mask)
 {
 	struct vega10_hwmgr *data = (struct vega10_hwmgr *)(hwmgr->backend);
-	uint32_t i;
+	int i;
 
 	if (hwmgr->dpm_level != AMD_DPM_FORCED_LEVEL_MANUAL)
 		return -EINVAL;