audio/tuneradio: Mark DEPRECATED

- Requires defunct bktr driver which will no longer be available
  after the EOL of 12
- Set EXPIRATION_DATE to 2023-12-31 the same for the EOL of 12

Approved by:	portmgr (blanket)

audio/tuneradio/Makefile

@@ -8,6 +8,8 @@ MAINTAINER=	pozar@lns.com
 COMMENT=	Command line method of tuning a Brooktree FM tuner card
 WWW=		https://www.lns.com/papers/tuneradio/
 
+DEPRECATED=	Requires defunct bktr
+EXPIRATION_DATE=2023-12-31
 .if !exists(/usr/include/dev/bktr/ioctl_bt848.h)
 IGNORE=	needs bktr(4) which is no longer available on your FreeBSD version
 .endif