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: Geert Uytterhoeven <[e-mail]>
Fixes: 44091d29f207 ("lib: Introduce priority array area manager")
Signed-off-by: Jiri Pirko <[e-mail]>
Tested-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

lib/Kconfig

···
 	bool
 
 config PARMAN
-	tristate "parman"
+	tristate
 
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