Add warning / critical temperature settings for planar temperature sensors

meta-rcs/meta-blackbird/recipes-phosphor/sensors/phosphor-hwmon/obmc/hwmon/ahb/apb/bus@1e78a000/i2c-bus@440/w83773g@4c.conf

 LABEL_temp1 = "pcie"
 LABEL_temp2 = "cpu_1_ambient"
 LABEL_temp3 = "ambient"
+
+WARNLO_temp1 = "0"
+WARNLO_temp2 = "0"
+WARNLO_temp3 = "0"
+
+CRITLO_temp1 = "-40000"
+CRITLO_temp2 = "-40000"
+CRITLO_temp3 = "-40000"
+
+WARNHI_temp1 = "45000"
+WARNHI_temp2 = "65000"
+WARNHI_temp3 = "35000"
+
+CRITHI_temp1 = "65000"
+CRITHI_temp2 = "85000"
+CRITHI_temp3 = "55000"
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