Suppress warning message in getFanSpeed function

Many data center cards are fanless. Don't show warning if unable to get
fan speed. The fan speed will be reported as 0

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Change-Id: I53efe67ac88fb0824cf4820430b46c18bc7692df


[ROCm/amdsmi commit: 1c9e384c8f]

projects/amdsmi/python_smi_tools/rocm_smi.py

@@ -179,10 +179,10 @@ def getFanSpeed(device):
     fm = 0
 
     ret = rocmsmi.rsmi_dev_fan_speed_get(device, sensor_ind, byref(fanLevel))
-    if rsmi_ret_ok(ret, device):
+    if rsmi_ret_ok(ret, device, None, True):
         fl = fanLevel.value
     ret = rocmsmi.rsmi_dev_fan_speed_max_get(device, sensor_ind, byref(fanMax))
-    if rsmi_ret_ok(ret, device):
+    if rsmi_ret_ok(ret, device, None, True):
         fm = fanMax.value
     if fl == 0 or fm == 0:
         return (fl, fm) #  to prevent division by zero crash