configurations: santabarbara: adjust SWB_ADC config

1. The PCIe switch is only powered when the host is on. To prevent
false threshold alters, add PowerState for switch adc sensor.

2. Fix typo.

Change-Id: I4313416354ea823a024a75df3beae424155298bb
Signed-off-by: Fred Chen <Fred.Chen@quantatw.com>
diff --git a/configurations/meta/santabarbara_pcie_switch_board.json b/configurations/meta/santabarbara_pcie_switch_board.json
index 3d6ac50..4bef7a6 100644
--- a/configurations/meta/santabarbara_pcie_switch_board.json
+++ b/configurations/meta/santabarbara_pcie_switch_board.json
@@ -12,7 +12,8 @@
                 "in6",
                 "in7"
             ],
-            "Name": "MB_ADC0",
+            "Name": "SWB_ADC0",
+            "PowerState": "On",
             "Thresholds": [
                 {
                     "Direction": "greater than",