[media] tm6000: rewrite IR support

The IR support were broken on my tests with HVR-900H. Also,
there were several issues on the current implementation.
This patch is a major rewrite of the IR support for this
	- Improve debug messages;
	- Don't do polling for interrrupt based IR;
	- Add proper support for RC-5 protocol;
	- Always provide 16 bits for NEC and RC-5;
	- Fix polling code;
	- Split polling functions from URB Interrupt ones;
	- Don't hardcode the XTAL reference for tm6000 IR;
	- If a URB submit fails, retries after 100ms;
	- etc.

Tested on Hauppauge HVR-900H, with RC-5 and NEC remotes.

Issues on IR handling, on this device:
	- Repeat events aren't detected (neither on NEC or RC-5);
	- NEC codes are always provided with 16 bits.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/tm6000/tm6000-core.c

@@ -541,7 +541,7 @@ static struct reg_init tm6010_init_tab[] = {
 	{ TM6010_REQ07_RDE_IR_PULSE_CNT1, 0x20 },
 	{ TM6010_REQ07_RDF_IR_PULSE_CNT0, 0xd0 },
 	{ REQ_04_EN_DISABLE_MCU_INT, 0x02, 0x00 },
-	{ TM6010_REQ07_RD8_IR, 0x2f },
+	{ TM6010_REQ07_RD8_IR, 0x0f },
 
 	/* set remote wakeup key:any key wakeup */
 	{ TM6010_REQ07_RE5_REMOTE_WAKEUP,  0xfe },