Fix Config file spelling to enable Aggressive LRU in Hostboot

Signed-off-by: Bill Hoffa <wghoffa@us.ibm.com>
diff --git a/openpower/configs/hostboot/rainier.config b/openpower/configs/hostboot/rainier.config
index acc92a4..34de7fb 100755
--- a/openpower/configs/hostboot/rainier.config
+++ b/openpower/configs/hostboot/rainier.config
@@ -39,7 +39,7 @@
 unset SBE_UPDATE_SIMULTANEOUS
 unset NO_SBE_UPDATES
 # NOTE: Aggressive LRU currently required to free enough memory for SBE updates
-set AGGRESIVE_LRU
+set AGGRESSIVE_LRU
 
 #unset PCIE_HOTPLUG_CONTROLLER