[IRDA]: nsc-ircc: support for yet another Thinkpad IrDA chipset

This patch simply adds support for a variation of the nsc-ircc PC8739x
chipset, found in some IBM Thinkpad laptops.

Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: Samuel Ortiz <samuel.ortiz@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>