configurations: santabarbara: fix vdrop read from wrong attribute

Using the correct attribute mapped to the VSHUNT register
to measure the voltage drop.

Change-Id: I717497a1007957fd775ac53dc56a9bac05bd13a6
Signed-off-by: Fred Chen <Fred.Chen@quantatw.com>
diff --git a/configurations/meta/santabarbara_pdb1.json b/configurations/meta/santabarbara_pdb1.json
index 2e3b18c..5ca8c4d 100644
--- a/configurations/meta/santabarbara_pdb1.json
+++ b/configurations/meta/santabarbara_pdb1.json
@@ -10,21 +10,21 @@
             "Address": "0x42",
             "Bus": 45,
             "Labels": [
-                "in1"
+                "in0"
             ],
             "Name": "PDB1_P52V_SENSE",
             "Type": "INA238",
-            "in1_Name": "PDB1_P52V_SENSE_VOLT_V"
+            "in0_Name": "PDB1_P52V_SENSE_VOLT_V"
         },
         {
             "Address": "0x43",
             "Bus": 45,
             "Labels": [
-                "in1"
+                "in0"
             ],
             "Name": "PDB1_GND_SENSE",
             "Type": "INA238",
-            "in1_Name": "PDB1_GND_SENSE_VOLT_V"
+            "in0_Name": "PDB1_GND_SENSE_VOLT_V"
         },
         {
             "Address": "0x4c",