psu-ng: Allow more than expected number of PS

When checking for a valid configuration, the number of present power
supplies should not be less than the expected number. Allow the expected
number or greater to be present without error.

Signed-off-by: Jim Wright <jlwright@us.ibm.com>
Change-Id: I725f65fe8a799c9d2205baeb4f8081799c50ce7d
diff --git a/phosphor-power-supply/psu_manager.cpp b/phosphor-power-supply/psu_manager.cpp
index 50917ae..320ea55 100644
--- a/phosphor-power-supply/psu_manager.cpp
+++ b/phosphor-power-supply/psu_manager.cpp
@@ -928,7 +928,9 @@
             continue;
         }
 
-        if (presentCount != config.second.powerSupplyCount)
+        // Number of power supplies present should equal or exceed the expected
+        // count
+        if (presentCount < config.second.powerSupplyCount)
         {
             tmpAdditionalData.clear();
             tmpAdditionalData["EXPECTED_COUNT"] =