[media] doc-rst: Fix LIRC_GET_FEATURES references

The references pointed by LIRC_GET_FEATURES ioctl are broken.

Fix them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/Documentation/media/lirc.h.rst.exceptions b/Documentation/media/lirc.h.rst.exceptions
index 17f6e7e..246c850 100644
--- a/Documentation/media/lirc.h.rst.exceptions
+++ b/Documentation/media/lirc.h.rst.exceptions
@@ -24,6 +24,10 @@
 ignore define LIRC_CAN_SEND
 ignore define LIRC_CAN_REC
 
+ignore define LIRC_CAN_SEND_MASK
+ignore define LIRC_CAN_REC_MASK
+ignore define LIRC_CAN_SET_REC_DUTY_CYCLE
+
 # Undocumented macros
 
 ignore define PULSE_BIT