Rename CONFIG_NFSMOUNT to CONFIG_FEATURE_MOUNT_NFS so allbaseconfig can
find it (and tweak defconfig to catch up).
diff --git a/util-linux/Config.in b/util-linux/Config.in
index 01da99c..dc6d8fd 100644
--- a/util-linux/Config.in
+++ b/util-linux/Config.in
@@ -325,7 +325,7 @@
 	  NFS filesystems.  Most people using BusyBox will also want to enable
 	  the 'mount' utility.
 
-config CONFIG_NFSMOUNT
+config CONFIG_FEATURE_MOUNT_NFS
 	bool "  Support mounting NFS file systems"
 	default n
 	depends on CONFIG_MOUNT