fix zswap enable flag

zswap should only be enabled if ENABLE_ZSWAP is true.
The if condition was checking ENABLE_KSMTUNED.
That is now fixed.

Change-Id: I76ba139de69fb1710bcb96cc9f638260463e2032
diff --git a/lib/host b/lib/host
index 95c5b9b..2fa22e2 100644
--- a/lib/host
+++ b/lib/host
@@ -37,7 +37,7 @@
 ZSWAP_COMPRESSOR=${ZSWAP_COMPRESSOR:="lz4"}
 ZSWAP_ZPOOL=${ZSWAP_ZPOOL:="z3fold"}
 function configure_zswap {
-    if [[ $ENABLE_KSMTUNED == "True" ]] ; then
+    if [[ $ENABLE_ZSWAP == "True" ]] ; then
         # Centos 9 stream seems to only support enabling but not run time
         # tuning so dont try to choose better default on centos
         if is_ubuntu; then