lib: Remove string from parman config selection

As reported by Geert, remove the string so the user does not see this
config option. The option is explicitly selected only as a dependency of
in-kernel users.
Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Fixes: 44091d29 ("lib: Introduce priority array area manager")
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Tested-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

lib/Kconfig

@@ -551,6 +551,6 @@ config SBITMAP
 	bool
 
 config PARMAN
-	tristate "parman"
+	tristate
 
 endmenu