media: lirc: add missing exceptions for lirc uapi header file

Commit e5499dd7 ("media: lirc: revert removal of unused feature
flags") reintroduced unused feature flags in the lirc uapi header, but
failed to reintroduce the necessary exceptions for the docs.

Fixes: e5499dd7 ("media: lirc: revert removal of unused feature flags")
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/userspace-api/media/lirc.h.rst.exceptions

@@ -30,6 +30,8 @@ ignore define LIRC_CAN_REC
 
 ignore define LIRC_CAN_SEND_MASK
 ignore define LIRC_CAN_REC_MASK
+ignore define LIRC_CAN_SET_REC_FILTER
+ignore define LIRC_CAN_NOTIFY_DECODE
 
 # Obsolete ioctls