Set storage driver explictly in the crio.conf

crio.conf(5) says:

   storage_driver=""
   CRIO storage driver (default is "overlay")

   Note:
   overlay and overlay2 are the same driver

deploy/iso/minikube-iso/package/crio-bin/crio-bin.mk

@@ -61,7 +61,7 @@ define CRIO_BIN_INSTALL_TARGET_CMDS
 		$(TARGET_DIR)/etc/containers/registries.conf
 
 	mkdir -p $(TARGET_DIR)/etc/sysconfig
-	echo 'CRIO_OPTIONS="--storage-driver=overlay2 --log-level=debug"' > $(TARGET_DIR)/etc/sysconfig/crio
+	echo 'CRIO_OPTIONS="--log-level=debug"' > $(TARGET_DIR)/etc/sysconfig/crio
 endef
 
 define CRIO_BIN_INSTALL_INIT_SYSTEMD

deploy/iso/minikube-iso/package/crio-bin/crio.conf

@@ -12,7 +12,7 @@ runroot = "/var/run/containers/storage"
 
 # storage_driver select which storage driver is used to manage storage
 # of images and containers.
-storage_driver = ""
+storage_driver = "overlay"
 
 # storage_option is used to pass an option to the storage driver.
 storage_option = [