[IRDA]: Add stir4200 driver.

	After a long maturation, this is time to send you the latest
version of the stir4200 USB driver. Initially started by Paul Stewart,
modified by Martin Diehl and me, and later partially rewriten by
Stephen Hemminger.
	The hardware has many quirks. This is the first version that
work reliably at SIR and mostly work at FIR. We may never get optimal
operation from this hardware due to its pecularities, but at least its
now usable.

drivers/net/irda/Kconfig

@@ -292,6 +292,22 @@ config USB_IRDA
 	  Please note that the driver is still experimental.  And of course,
 	  you will need both USB and IrDA support in your kernel...
 
+config SIGMATEL_FIR
+	tristate "SigmaTel STIr4200 bridge (EXPERIMENTAL)"
+	depends on IRDA && USB && EXPERIMENTAL
+	select CRC32
+	---help---
+	  Say Y here if you want to build support for the SigmaTel STIr4200
+	  USB IrDA FIR bridge device driver.  
+
+	  USB bridge based on the SigmaTel STIr4200 don't conform to the
+	  IrDA-USB device class specification, and therefore need their
+	  own specific driver. Those dongles support SIR and FIR (4Mbps)
+	  speeds. 
+
+	  To compile it as a module, choose M here: the module will be called
+	  stir4200.
+
 config NSC_FIR
 	tristate "NSC PC87108/PC87338"
 	depends on IRDA && ISA

drivers/net/irda/Makefile

@@ -9,6 +9,7 @@
 obj-$(CONFIG_IRPORT_SIR)	+= 		irport.o
 # FIR drivers
 obj-$(CONFIG_USB_IRDA)		+= irda-usb.o
+obj-$(CONFIG_SIGMATEL_FIR)	+= stir4200.o
 obj-$(CONFIG_NSC_FIR)		+= nsc-ircc.o
 obj-$(CONFIG_WINBOND_FIR)	+= w83977af_ir.o
 obj-$(CONFIG_SA1100_FIR)	+= sa1100_ir.o