ovl: Kconfig: Fix spelling mistake "undelying" -> "underlying"

There is a spelling mistake in a Kconfig description. Fix it.

Signed-off-by: Colin Ian King <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>

Author: ColinIanKing

fs/overlayfs/Kconfig

@@ -96,7 +96,7 @@ config OVERLAY_FS_XINO_AUTO
 	depends on 64BIT
 	help
 	  If this config option is enabled then overlay filesystems will use
-	  unused high bits in undelying filesystem inode numbers to map all
+	  unused high bits in underlying filesystem inode numbers to map all
 	  inodes to a unified address space.  The mapped 64bit inode numbers
 	  might not be compatible with applications that expect 32bit inodes.