[LIB]: Make TEXTSEARCH_BM plain tristate like the others

And select it when the relevant modules are enabled.

Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/Kconfig

@@ -491,6 +491,7 @@ config NET_EMATCH_TEXT
 	depends on NET_EMATCH
 	select TEXTSEARCH
 	select TEXTSEARCH_KMP
+	select TEXTSEARCH_BM
 	select TEXTSEARCH_FSM
 	---help---
 	  Say Y here if you want to be ablt to classify packets based on