V4L/DVB: ir-core: remove IR_TYPE_PD

Pulse-distance is not a protocol, it is a line coding (used by some protocols,
like NEC). Looking at the uses of IR_TYPE_PD, the real protocol seems to be
NEC in all cases (drivers/media/video/cx88/cx88-input.c is the only user).

So, remove IR_TYPE_PD while it is still easy to do so.

Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/media/ir-kbd-i2c.h b/include/media/ir-kbd-i2c.h
index 057ff64..0506e45 100644
--- a/include/media/ir-kbd-i2c.h
+++ b/include/media/ir-kbd-i2c.h
@@ -36,7 +36,7 @@
 struct IR_i2c_init_data {
 	char			*ir_codes;
 	const char             *name;
-	u64          type; /* IR_TYPE_RC5, IR_TYPE_PD, etc */
+	u64          type; /* IR_TYPE_RC5, etc */
 	/*
 	 * Specify either a function pointer or a value indicating one of
 	 * ir_kbd_i2c's internal get_key functions