media: rc: clean up leader pulse/space for manchester encoding

The IR rc6 encoder sends the header using manchester encoding using 0
bits, which causes the following:

UBSAN: Undefined behaviour in drivers/media/rc/rc-ir-raw.c:247:6
shift exponent 4294967295 is too large for 64-bit type 'long long unsigned int'

So, allow the leader code to send a pulse and space and remove the unused
pulse_space_start field.

Cc: Antti Seppälä <a.seppala@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/rc/ir-rc5-decoder.c

@@ -173,16 +173,14 @@ out:
 }
 
 static const struct ir_raw_timings_manchester ir_rc5_timings = {
-	.leader			= RC5_UNIT,
-	.pulse_space_start	= 0,
+	.leader_pulse		= RC5_UNIT,
 	.clock			= RC5_UNIT,
 	.trailer_space		= RC5_UNIT * 10,
 };
 
 static const struct ir_raw_timings_manchester ir_rc5x_timings[2] = {
 	{
-		.leader			= RC5_UNIT,
-		.pulse_space_start	= 0,
+		.leader_pulse		= RC5_UNIT,
 		.clock			= RC5_UNIT,
 		.trailer_space		= RC5X_SPACE,
 	},
@@ -193,8 +191,7 @@ static const struct ir_raw_timings_manchester ir_rc5x_timings[2] = {
 };
 
 static const struct ir_raw_timings_manchester ir_rc5_sz_timings = {
-	.leader				= RC5_UNIT,
-	.pulse_space_start		= 0,
+	.leader_pulse			= RC5_UNIT,
 	.clock				= RC5_UNIT,
 	.trailer_space			= RC5_UNIT * 10,
 };