configs: add ibm rainier 1s4u

The rainier 1s4u system will be different enough from the standard 4u
variant that a new config is required. These differences include a
different kernel device tree, different power supplies, and a
different fan configuration.

Tested:
- Verified that when IM keyword was programmed to match the 1s4u that
  correct config was loaded by entity manager
  /xyz/openbmc_project/inventory/system/chassis
     `-/xyz/openbmc_project/inventory/system/chassis/Rainier_1S4U_Chassis
     `-/xyz/openbmc_project/inventory/system/chassis/Rainier_1S4U_Chassis/Compatible_System

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Ieca50c03154d268726ed9ec541939e73658d427d
diff --git a/configurations/Rainier 4U Chassis.json b/configurations/Rainier 4U Chassis.json
index cd22108..814aa9a 100644
--- a/configurations/Rainier 4U Chassis.json
+++ b/configurations/Rainier 4U Chassis.json
@@ -11,9 +11,7 @@
     ],
     "Name": "Rainier 4U Chassis",
     "Probe": [
-        "com.ibm.ipzvpd.VSBP({'IM': [80, 0, 16, 0]})",
-        "OR",
-        "com.ibm.ipzvpd.VSBP({'IM': [80, 0, 16, 2]})"
+        "com.ibm.ipzvpd.VSBP({'IM': [80, 0, 16, 0]})"
     ],
     "Type": "Chassis"
 }