V4L/DVB (10633): DAB: fix typo

Fix typo in "DAB adapters" section in Kconfig.
Signed-off-by: NMárton Németh <nm127@freemail.hu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/Kconfig

@@ -117,7 +117,7 @@ source "drivers/media/dvb/Kconfig"
 config DAB
 	boolean "DAB adapters"
 	---help---
-	  Allow selecting support for for Digital Audio Broadcasting (DAB)
+	  Allow selecting support for Digital Audio Broadcasting (DAB)
 	  Receiver adapters.
 
 if DAB